Green’s Dictionary of Slang

flash n.1

1. in senses of display, ostentation.

(a) a nouveau riche, ostentatious person.

[UK]Low-life 74: The Jemmies, Brights, Flashes, Puzzes, Pizzes and Smarts of the Town [are] preparing to ride out in fives and sixes.
[UK]M.P. Andrews Better Late than Never 33: What, young flash away turned duellist!
R. Dighton 20 Nov. in Padbury View of Dightons (2007) 41: [pic. caption] Beau N-sh – What a Flash.
[UK]‘An Amateur’ Real Life in London I 559: Many a twelver † does he get by buying up broken images of persons who sell them by wholesale, and he of course gets them for little or nothing: then what does he do but dresses out his board, to give them the best appearance he can, and toddles into the streets, touting†† for a good customer. The first genteel bit of flash he meets that he thinks will dub up the possibles,? he dashes down the board, breaks all the broken heads, and appeals in a pitiful way for remuneration for his loss; so that nine times out of ten he gets some Johnny-raw or other to stump up the rubbish.
[Aus]E. Dyson ‘At the Opera’ Benno and Some of the Push 86: A brother, known as ‘The Flash’, who was recognised as one of the best-dressed ‘guns’ in the metropolis.
[US]Irwin Amer. Tramp and Und. Sl. 74: Flash.–A gaudy or well-dressed person.

(b) fashion.

[UK]Sporting Mag. Oct. XXV 45/1: Don’t you know me? Jenny Dash! / Every where the go and flash!

(c) ostentation, showiness, vulgarity; used pos. as wit (see cite 1779); also adj. (see cite 1872).

[UK]B. Weatherby Great News from Hell 14: Three Irish Fortune-hunters, who [...] used to cut no small Flash about the Garden.
[UK]Thrale Thraliana i Mar. 24 375: What says I should we call our Paper? Oh the Flasher to be sure says She—we have a Hack Phrase here at Streatham of call’g ev’ry thing Flash which we want other folks to call Wit.
[Ire]J. O’Keeffe London Hermit (1794) 19: You can keep pace with them in flash and expenses.
[UK]‘Humbug Club Song’ in Hilaria 43: The captain’s a compound of flash and cockade, / Cosmetics, pink powder, with curl carronade, / And his feats are confin’d to box-lobby parade.
[UK] ‘Midnight Mishaps’ Bentley’s Misc. Aug. 203: ‘No flash, – it won’t do, – you’ll undress,’ said the taller of the three.
[Aus]Sydney Gaz. 5 Dec. 2/5: With respect to that spirit of association which is understood among you by the slang term of ‘Flash,’ I would entreat all those who are not bent on getting hanged, to beware of giving into it.
[US]T. Haliburton Sam Slick in England II 129: I make allowances for the gear, and the gettin’ up, and the vampin’, and all that sort o’ flash.
[US]Nat. Police Gaz. (NY) 25 Apr. 3/1–2: [Bobby is] always on points, and somewhat ambitious to give important arrests to the stiffs (newspapers) for the purpose of making a terrible flash and gammoning the flats.
[US]E. Perkins Saratoga in 1901 207: Cant words [...] used to be the mode at Saratoga years ago. Swell, nobby, spooney, jolly, loud, bore and a half-dozen other flash words.
[US]H. Green Actors’ Boarding House (1906) 327: He ast me fur the loan of the diamond an’ emerald ring he gimme, so’s tuh make a flash before his uncle from Ireland who’s got money.
[US]Hostetter & Beesley It’s a Racket! 225: flash—[...] showy appearance.
[US]J. Lait Put on the Spot 73: To show he was a big-timer, he flashed me in front o’ Kinky. Kinky had a grand eye for that kind o’ flashes.
[US]J.H. O’Hara Pal Joey 39: Think of the flash, as they used to say in vaudeville.
[US] ‘Good-Doing Wheeler’ in D. Wepman et al. Life (1976) 77: I don’t go for no flash, I’m out for cash.
[US]‘Iceberg Slim’ Pimp 98: You ain’t got no front and flash.
The Who ‘Bell Boy’ 🎵 on Quadrophrenia [album] I work in a hotel, all gilt and flash.
[US]D. Woodrell Muscle for the Wing 96: Shuggie was a hybrid of flab and flash.
[Aus](con. 1964-65) B. Thorpe Sex and Thugs and Rock ’n’ Roll 98: It [i.e. a performance] needed some flash.
[UK]N. Cohn Yes We have No 132: The foundations have rotted, but the flash remains.
[US]G. Pelecanos Drama City 106: Show no flash, hold a job up at the car wash.
[Scot]T. Black Gutted 59: The flash, the wheels, the bling, the clobber...it’s as obvious as a donkey’s cock.
[US]T. Piccirilli Last Kind Words 229: He wore his best jewelry. Rolex watch, diamond pinkie ring, a gold bracelet [...] it all served as distraction and decoy. The more flash you wore, the more chance that someone was looking at the shine and not at your four-card pull.
J. Meades in LRB 9 June 🌐 [O]ur new slebs, quick learners all. It’s their world now: bling, glitz, flash.

(d) (US Und.) a show-off, a braggart.

[US]C.S. Montanye ‘White as Snow’ Detective Story 18 Feb. 🌐 Why, that cheap flash couldn’t get even with a wop peanut seller!

(e) (US Und.) a suit of clothes.

[US]C.G. Givens ‘Chatter of Guns’ Sat. Eve. Post 13 Apr.; list extracted in AS VI:2 (1930) 132: flash, n. Suit of clothes.
[US]Goldin et al. DAUL 71/1: Flash, n. [...] 6. A suit of clothes; an outfit.

(f) (Aus.) one’s personal appearance.

[Aus]Baker Popular Dict. Aus. Sl. (2nd edn).

2. a periwig; thus rum flash n., a long, full, expensive wig; queer flash n., an old, raggedy wig [? its being worn by an ostentatious person, i.e. sense 1b above].

[UK]B.E. Dict. Canting Crew n.p.: Flash c. a Periwig.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. n.p.: flash a Peruke.
[UK]B.M. Carew Life and Adventures.
[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Flash, a periwig; rum flash; a fine long wig; queer flash; a miserable weather-beaten caxon.
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Duncombe New and Improved Flash Dict.

3. in the context of the criminal and/or sporting worlds.

(a) cant or criminal slang; also attrib.

[UK]Life and Character of Moll King 10: This Flash, as it is called, is talking in Cant Terms, very much us’d among Rakes and Town Ladies.
[UK]G. Parker Life’s Painter 144: The explanation of the Cant, Flash and Slang terms [...] gives at one view, a perfect knowledge of the artifices, combinations, modes and habits of those invaders of our property, our safety and our lives, who have a language quite unintelligible to any but themselves.
[UK]H.T. Potter New Dict. Cant (1795).
[UK]W. Trench Settlement at Port Jackson 207: A leading distinction, which marked the convicts on their outset in the colony, was an use of what is called the flash, or kiddy language.
[UK] ‘The Blue Lion’ in Holloway & Black I (1975) 31: They’ll cut a dash, and hear the flash.
[UK]T. Moore ‘Ya-Hip, My Hearties!’ in Farmer Musa Pedestris (1896) 88: I soon learned to patter flash.
[UK]W.T. Moncrieff Tom and Jerry I iv: Flash, my young friend, or slang, as others call it, is the classical language of the Holy Land; in other words, St. Giles’s greek [...] Flash, my young friend, or slang, as others call it, is a species of cant in which the knowing ones conceal their roguery from the flats.
[UK] ‘All England Now are Slanging It’ Museum of Mirth 40/1: No, no Barbary tongue at all, merely a little rum slum to put the knowing ones awake and queer the flats with. [...] Flash is cant, cant is patter, patter is lingo, lingo is language, and language is flash.
[US]N.Y. Daily Express 20 Nov. 2/7: Robbing Store Tills. — [...] Among thieves this feat is termed in their flash dialect till-tilting.
[Aus]Satirist & Sporting Chron. (Sydney) 4 Mar. 2/1: I was nabbed (I know you understand a little flash).
[US]‘Ned Buntline’ Mysteries and Miseries of N.Y. I 39: I’ve got but one book on the flash, and that’s Captain Grose’s dictionary.
[US]O.W. Holmes Autocrat of the Breakfast Table 300: The young fellow called John [...] said it was ‘rum’ to hear me ‘pitchin’ into fellers’ for ‘goin’ it in the slang line,’ when I used all the flash words myself.
[Aus]J.F. Mortlock Experiences of a Convict (1965) 120: To ‘stick up’ a person, house, or dray, means, in Australian ‘flash’ phraseology, to come suddenly with presented arms upon them.
[UK]Sl. Dict. 163: Flash ‘flash, my young friend, or Slang, as others call it, is the classical language of the Holy Land; in other words, St. Giles’s Greek.’ ? Tom and Jerry, by Moncreiff. Vulgar language was first termed FLASH in the year 1718, by Hitchin, author of ‘The Regulator of Thieves, &c., with account of flash words.’ “FLASH” is sometimes exchangeable with ‘fancy.’.
[Aus]Sydney Sl. Dict. (2 edn) 4: Flash - The Cant talk among thieves and ‘The talent’.
[UK]H. Smart Post to Finish III 86: Some knowledge of slang is and always was part of a gentleman’s education. Why, when the late Lord Lytton wrote ‘Pelham’ it was brought against him that ‘his knowledge of flash was evidently purely superficial.’ Flash, my sister, is merely [...] thieves’ argot.
[Aus]Bulletin (Sydney) 6 Sept. 24/1: ‘Twisting a fawnie’ is ‘flash’–slang for stealing wedding-rings.
[Aus]G.A. Wilkes Exploring Aus. Eng. 13: One enterprising convict, James Hardy Vaux, put together a vocabulary of the criminal slang of the colony – the ‘flash’ language – in 1812.
[Aus]G. Seal Lingo 32: This criminal argot, or flash language, used for clandestine communication within the convict subculture, gave quite a few terms to the broader vernacular.

(b) a generic term for the criminal underworld.

[UK]Sporting Mag. Apr. XVI 26/2: Within a rattler stands Moll Flash, / To see the kiddies die.
[UK] ‘Crib & the Black’ Egan Boxiana I (1971) 481: Ye swells, ye flash, ye milling coves, who this hard light see, / Let us drink to these heroes, come join along with me.

(c) sporting jargon.

[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 80: Of course, those words and sayings which are appropriate to the turf, the ring, and field-sports, are equally considered as flash.

4. a measure, a drink of alcohol.

[UK]Pierce Egan’s Life in London 7 Jan. 812/3: [T]he hitherto bold Two to One began to funk and wanted [...] a flash or two of Seager’s Daffy to keep up their spirits.

5. with ref. to money or commodities (often counterfeit).

(a) (UK Und.) a large bundle of notes, esp. when used in a game of three-card monte to entice victims; thus make a flash v., to exhibit a large bundle of notes.

[UK] ‘Her Muns with a Grin’ Swell!!! or, Slap-Up Chaunter 50: All moonshine to stash — is the young lightning’s flash / [...] / that is got a by a smash, / At the vendor of vet.
[US]Ade Artie (1963) 46: He can always make a flash o’ the long green.
[US]‘Goat’ Laven Rough Stuff 12: If a man or a woman made a flash of any kind there they was either torpedoed (drugged) or robbed.
[UK]F.D. Sharpe Sharpe of the Flying Squad 218: If they are absolutely broke they get their pals to set them up with what is termed ‘a flash,’ that is a wad of notes to be flashed in front of a victim.
[US]C.S. Montanye ‘Frozen Stiff’ Popular Detective Mar. 🌐 Tommy had the visitor’s leather, full of green, in a hip pocket, along with his flash.
[US]J. Thompson Texas by the Tail (1994) 101: Want to show a bundle of flash? The banker will benevolently count it out for you.
[US]‘Iceberg Slim’ Airtight Willie and Me 30: I had loaned him my total flash.
[US]T. Robinson Hard Bounce [ebook] Junior brought out the flash money — a hundred wrapped around a thick wad of ones.

(b) (UK Und.) imitation gold coins or banknotes; also attrib.

[US]H.L Williams Ticket-of-Leave Man 26: Converting the twenty-pound ‘flash’ into cash, or as Jem would have said: ‘Planting the big ’un!’.
[UK]Marvel 17 Nov. 47 2: He was a useful chap at passing the flash stuff [...] ‘Gave me a free hand looking after my work here – turning out flash money, which paid a sight better than the doss-house, you bet!’ [...] By this time he had sorted out from the box several bundles of forged banknotes.
[UK]V. Davis Phenomena in Crime 81: Imitation Bank of England notes known as ‘flash’. (So called because it is ‘flashed’ before the eyes of a dupe).

(c) (UK/US Und.) cheap but alluring items, e.g. cheap jewellery, used to lure players into carnival games, confidence tricks etc.

[UK]T. Norman Penny Showman 50: The front flash or paintings were fastened up in the windows.
[US]Ersine Und. and Prison Sl. 37: flash, n. 1. Cheap jewlery; anything that is meant to be impressive.
[US]J.L. Kuethe ‘Prison Parlance’ in AS IX:1 26: flash. Something that attracts attention.
[US] ‘I’ll Gyp You Every Time’ in C. Hamilton Men of the Und. 178: The prizes I used as ‘flash’ — percolators, blankets, clocks — were also numbered.
[US]C. Hamilton Men of the Und. 322: Flash, 1. A display to attract gambling victims.
[UK]T. Taylor Baron’s Court All Change (2011) 94: ‘I’ve got the best flash in the whole gaff’.
[US]W. Keyser ‘Carny Lingo’ in http://goodmagic.com 🌐 Flash (n) — Your best-looking prizes, arrayed to catch the eye of the crowd. ‘Hard flash’ is large and expensive-looking prizes. These items may be completely impossible to win, the lesser prizes being hidden under the counter.

(d) (US) (genuine) jewels.

[US]C.S. Montanye ‘Crepe for Suzette’ Thrilling Detective Oct. 🌐 [of emeralds] So Nick still thought I had the green flash?

(e) anything counterfeit.

[US]A.S. Fleischman Venetian Blonde (2006) 147: My friend here wants to know if them pointers are real or just for flash.

(f) (US gay) cheap jewellery worn by homosexual males.

[US]B. Rodgers Queens’ Vernacular 82: flash [...] 2. flashy jewelry of poor workmanship; going the flash = wearing cheap jewelry.

6. see flash of lightning under lightning n.

7. in senses of brevity .

(a) (orig. US) a quick look around.

[US]F.P. Dunne Mr Dooley in the Hearts of his Countrymen 130: Run in, an’ take a flash iv it.
[US]H. Green Actors’ Boarding House (1906) 230: It’s a pipe he never took more’n one flash.
[US]E. Booth Stealing Through Life 295: Stick with Buddy a moment – I’ll take a flash myself.

(b) (orig. US) a brief glimpse [initially a ref. to the conscious ‘flashing’ by striptease/burlesque artists].

[US]F. Hutcheson Barkeep Stories 17: ‘Well, de hobo gets a flash of him an’ lets one yell out [...] an’ tears fer de front door’.
[US]‘Hugh McHugh’ Out for the Coin 44: Just then I got a flash of Dike Lawrence bearing down in our direction.
[US]Van Loan ‘By a Hair’ Old Man Curry 70: These burglars could take one flash at the top of the deck and know just when to draw.
[US]H.C. Witwer Fighting Blood 250: Lots of guys passsing turns for another flash at her. She was easy to look at and no mistake.
[US]R. Chandler ‘Red Wind’ in Red Wind (1946) 28: I got a flash of him on the street night before last but I lost him.
[US]D. Maurer Big Con 87: That will give him the first flash.
[US]Goldin et al. DAUL 71/1: Flash, n. [...] 3. A glance, as at credentials.
[US]C. Hamilton Men of the Und. 322: Flash, [...] 2. A glance. 3. A signal of recognition.
[UK]M. Frayn Now You Know 246: Got this picture out of his bag, so I know he wants to give me a flash of it.

(c) a brief glimpse when offered to a man by a woman inadvertently revealing her thighs, breasts or genitals; or vice versa, of a penis.

[[US]Ade Knocking the Neighbors 81: He had gone to the Dressing Room and taken a private Flash at the Magazine Beauty].
[US]‘Mae West in “The Hip Flipper”’ [comic strip] in B. Adelman Tijuana Bibles (1997) 93: Lotta got a flash of the Johnson bar.
[US]Monteleone Criminal Sl. (rev. edn).
[UK]G. Melly Owning Up (1974) 202: We all have our obsessions, and Mick’s was what he called a ‘flash’, a view of thigh and knicker.
[US]Current Sl. V:4.
[UK]P. Bailey Eng. Madam 32: Some of them wouldn’t leave the office until I’d given them a quick flash.
[US]E. Leonard Glitz 8: Pissing in an alley when a girl comes along? Pretend you don’t see her and give her a flash?
[US](con. c.1970) G. Hasford Phantom Blooper 148: Tracy’s goodbye flash brings a hoot and a holler from a squad of giggling pogues as they shove past me, hot on her trail.
[Aus](con. 1964-65) B. Thorpe Sex and Thugs and Rock ’n’ Roll 40: ‘It’s amazing how far a little flash goes,’ she added cheekily, slowly raising her skirt [...] to show the crotch of her white lace panties.
happyhooking.blogspot.com 24 July 🌐 Men will loudly exclaim ‘Oh my god’ when you accidentally give them an upskirt flash while you’re not paying attention.

(d) a sign of flirtatious behaviour.

[UK]F. Taylor Auf Wiedersehen Pet Two 266: When we went to Ally’s party, back in Geordie land, she definitely gave me a flash.

8. in senses of suddenness.

(a) (US) a surprising piece of news or a rumour.

[US]C.L. Cullen Tales of the Ex-Tanks 223: After you’d got your money down on the right one [...] the flash ’ud come in on one of the other skates.
[US]Hecht & MacArthur Front Page Act III: Hold the wire! I’ve got a flash for you.
[US]E. Wilson Look Who’s Abroad Now 19: ‘I would like you to let me have $150’ [...] Flash! I did not give him the $150.
[US]Ragen & Finston World’s Toughest Prison 799: flash – A rumor.
L. Schecter Jocks 37: The year Stengel was fired the Associated Press flash said he had ‘resigned’.
[US]B. Rodgers Queens’ Vernacular 82: flash 1. tidings, news scoop.
[US]A. Hoffman Property Of (1978) 224: I got a flash for you [...] It ain’t yours no more.

(b) (US) a burst of inspiration, a sudden idea.

[US]H.L. Wilson Professor How Could You! 90: However, I have a flash. I got it when come along in that car.
[US]C. Sandburg letter 9 May in Mitgang (1968) 305: I had a flash that the Hand of the Potter felt experimental.
[US]A. Hynd We Are the Public Enemies 140: Alvin Karpis had a hot flash. ‘Why don’t we all go to Florida?’.
[Aus]D. Stivens Jimmy Brockett 20: Jack and I had been overseas together after we cleaned up on a flash we worked on the cockies outback.
[US] in T.I. Rubin Sweet Daddy 8: I got this here flash – like, why don’t make with something new.
[US]L. Bangs in Psychotic Reactions (1988) 11: The real vision, the real freaking flash, was just like the reality.
[US]C. McFadden Serial 29: She [...] had a flash that made her feel a whole lot more integrated about Kate.
[US](con. early 1950s) J. Ellroy L.A. Confidential 106: He stopped on a flash: garbage cans, full, lined both sides of the street.
[US]C. Cook Robbers (2001) 253: Flash: call Katie. No, give her the space she’s claiming.

(c) a flashback.

[US]E. Booth Stealing Through Life 287: There had been a time when it would have made a sensation, but not now [...] it would be only a one-day flash.
[US]S. Frank Get Shorty [film script] MARTIN: I’m sitting here, I’m looking at you and I’m having these flashes. You know, flashbacks, of memories. (touches her hair) Of us.

9. a success.

[US]B. Schulberg Harder They Fall (1971) 45: He is not nearly the flash in business.

10. in the context of drugs.

(a) the instantaneous effect that follows the injection of a narcotic or other drug; also in non-drug use.

[US]Mezzrow & Wolfe Really the Blues 16: It was a lot more than a mere sex flash.
[US] cited in L.A. Times in Spears (1986).
[US]J. Mills Panic in Needle Park (1971) 43: Cocaine and bombitas are both stimulants, and combined with heroin, a depressant, they produce an electrifying ‘rush’ or ‘flash’ far more pleasurable to the addict than heroin alone.
[UK]C. Gaines Stay Hungry 145: I just shot it up and sat there laughing at this spade I was with while I had this monster flash, like creamin off in my head.
[US]Jackson & Christian Death Row 202: I went over the same things to try to be high again [...] I’m happy, but I don’t have that flash like I had.
[US]E. Bunker Little Boy Blue (1995) 285: They’re starting that lately [i.e. adding procaine to heroin], makes the flash stronger . . . but they cut the dope.
[UK]J. Morton Lowspeak 59: Flash – the effect of cocaine and to a lesser extent methedrine.
[US]E. Bunker Mr Blue 89: It makes the flash better.
[US]ONDCP Street Terms 9: Flash — [...] the rush of cocaine injection.
[UK]K. Richards Life 260: If you do it in the vein you get an incredible flash.

(b) a flashback to a previous psychotropic drug experience.

[US]N. von Hoffman We are the People Our Parents Warned Us Against 240: Everybody gets acid flashes – suddenly something trips you out and you’re back up high.

(c) the effect of LSD.

[US]Current Sl. V:4.

(d) LSD.

[US] S.N. Pradhan Drug Abuse.
[US]ONDCP Street Terms 9: Flash — LSD.

11. a cigarette lighter.

[UK]A. Sillitoe Start in Life (1979) 212: Mog wants his flash back [...] Moggerhanger sent me. He wants his lighter back.

12. a general term of address.

[US] M. Scorsese Mean Streets [film script] 73: The interest is going up [...] do you realise that, flash?

In phrases

cut a flash (v.)

to act in a vulgar manner, to show off.

[UK]J. Adams Diary (1964) lxvii: Shall I look out for a cause to speak to, and exert all the soul and all the body I own, to cut a flash, strike amazement, to catch the vulgar.
[Ire]K. O’Hara April-Day Act I: So handsome! so young, / And cut such a flash / As he pranc’d it along!
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd edn) n.p.: To cut a bosh, or a flash; to make a figure. Cant.
[UK]Sporting Mag. Jan. V 221/2: So come round me ye sportsmen, that’s smart and what not, / All stylish and cuttting a flash.
[UK]‘Jeremy Swell, Gent.’ Tailors’ Revolt 7: snip cried aloud, ‘Ah, ha, I’ll cut a flash.’.
[UK]Morn. Post (London) 18 Aug. 3/4: ’Twill be our turn to feast, and cut a flash.
[UK]‘A. Burton’ My Cousin in the Army 131: With air unruffled by the splash, He thus cuts out a ‘bit of flash,’ Which turn’d the attention of the crowd.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]Oxford Jrnl 5 Jan. 3/5: He said he wanted [the purse] a short time to cut a flash with it.
[UK]B.M. Carew Life and Adventures.
out of flash

in an attempt to show off; ‘a person who affects any particular habit, as swearing, dressing...taking snuff..., merely to be taken notice of, is said to do it “out of flash”’ (Vaux).

[Aus]Vaux Vocab. of the Flash Lang.
patter (the) flash (v.)

(UK Und.) to talk, usu. slang or underworld cant.

[UK]G. Parker Life’s Painter 120: Some they pattered flash with gallows fun and joking.
[UK]Lex. Balatronicum.
[UK]B. Gregson ‘Ya-Hip, My Hearties!’ in Moore Tom Crib’s Memorial to Congress 80: I FIRST was hir’d to peg a Hack [...] sometime back, / Where soon I learn’d to patter flash.
[UK] ‘Pickpocket’s Chaunt’ (trans. of ‘En roulant de vergne en vergne’) in Vidocq (1829) IV 260: I pattered in flash, like a covey knowing.
[UK]Egan Bk of Sports 262: [note] Tom is ‘the one’ to patter flash, And make the Coveys laugh.
[UK]J. Lindridge Sixteen-String Jack 303: Why he actually patters flash—how very vulgar, low and priggish.
[US]‘Ned Buntline’ Mysteries and Miseries of N.Y. I 39: Patter flash, my lucky, you’re as used to it as I am.
[UK]Kendal Mercury 3 Apr. 6/2: There he is, pottering [sic] his flash to a spicey moll.
[US] ‘Scene in a London Flash-Panny’ Matsell Vocabulum 100: Come, Bell, let us track the dancers and rumble the flats, for I’m tired of pattering flash and lushing jackey.
[UK]Western Dly Press 6 Dec. 3/3: Tramps [...] have a slang language of their own, not altogether unlike the ‘patter flash’ of the thieves.
[US]Cincinnati Enquirer 7 Sept. 10/7: [heading] How Any One Can Get Up in the Vernacular. And Patter Flash Like a Real Call.
[UK]London Standard 15 Feb. 6/6: The cant term ‘to patter the flash’ — i.e., to talk in slang.
[UK]C. Whibley ‘Deacon Brodie’ A Book of Scoundrels 242: He loved above all things to patter the flash.
[US]H.F. Day Landloper 33: Because I do not patter the flash lingo with you, you appear to take me for a college professor in disguise.
scoff the flash (v.)

(US Und.) to consume or otherwise use anything that is being displayed as a lure in a confidence trick.

[US]A.S. Fleischman Venetian Blonde (2006) 232: When the garbage workers – the fakirs pitching vegetable cutters – got hungry they could feed on the display. Scoff the flash. [...] A carnie always liked to work the broadie top – the girlie show. He could scoff the flash.
stam flash (v.) (also stam fish, stam flesh, stamp-flash) [? Ger. stimmen, to make one’s voice heard, to sing]

(UK Und.) to talk in thieves’ cant.

[Ire]Head Canting Academy (2nd edn) 180: Stam flesh To Cant.
[Ire]Head Eng. Rogue IV 152: Which Arts are divided into that of High-Padding, Low-Padding, Cloy-Filing, Bung-Nipping, Prancers Prigging, Duds-Lifting, Rhum-Napping, Cove-Cuffing, Mort-Trapping, Stamp-Flashing, Ken-Milling, Jerk the Naskin.
[UK]B.E. Dict. Canting Crew n.p.: Stam-flesh, c. to cant.
[UK]New Canting Dict. n.p.: stam flesh To Cant ; As the Cully Stams flesh rumly; He Cants very well.
[UK]Bailey Universal Etym. Eng. Dict. [as cit. 1725].
[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Stam flesh, to cant (cant).
[UK]H.T. Potter New Dict. Cant (1795) n.p.: stam flash to cant.
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Lex. Balatronicum [as cit. 1785].
[UK]G. Kent Modern Flash Dict. 31: Stam fish – to cant.
[UK]Flash Dict. in Sinks of London Laid Open [as cit. 1835].
[US]Matsell Vocabulum 85: stamfish To talk in a way not generally understood.

SE in slang uses

In compounds

flash in the pan (n.)

see separate entries.

flash of light (n.)

1. a gaudily dressed woman [‘upon the model of a rainbow’ (Ware)].

[UK]J. Ware Passing Eng. of the Victorian Era.

2. a sight [rhy. sl.].

‘The Cockney Handbook: Rhyming Sl.’ on powdermonster.net 🌐 flash (of light) – sight (As in [...] ‘she give me a flash’).