Green’s Dictionary of Slang

mag n.3

also magg, meag, meg

1. a halfpenny.

[UK]Life and Character of Moll King 11: Let me see, [...] a Double Gage of Rum Slobber, is Thrums; and a Quartern of Max, is three Megs.
[UK]J. Poulter Discoveries (1774) 43: A Meag and Jack; a Halfpenny and Farthing.
[UK] ‘The Potato Man’ in Farmer Musa Pedestris (1896) 55: Here’s light your honor for a mag.
[UK]G. Parker Life’s Painter 132: Bless your eyes and limbs, lay out a mag with poor chirruping Joe.
[US] ‘Flash Lang.’ in Confessions of Thomas Mount 18: Coppers, maggs.
[UK]G. Andrewes Dict. Sl. and Cant.
[Aus]Vaux Vocab. of the Flash Lang.
[UK]P. Egan Key to the Picture of the Fancy going to a Fight 17: [H]e has [...] blowed out his buffer well with the last mag left in his clie.
[UK]Egan Life in London (1869) 185: These are the sort of flats that the cup and ball chaps like, who will play and stand the grin, till they are completely cleaned out, and have not a mag left to help themselves with.
[UK]R. Nicholson Cockney Adventures 6 Jan. 74: Bill Smith [...] would go and play at the thimble-rig, and he lost all his money, every farden; he hadn’t got a mag left.
[UK]Flash Mirror 4: The Bug Walk [...] This house is a pannum supply; where can be had a good serve out of ‘ox wash’ for three maggs.
[Ire] ‘Jack Rag’ Dublin Comic Songster 4: If you see me on the crossing, and you can spare a mag, / I hope you won’t begrudge it me – poor Jack Rag.
[Aus]Satirist & Sporting Chron. (Sydney) 25 Feb. 3/2: And every mag he had in his bag / Was ever poor Claud’s and mine.
[Aus]Bell’s Life in Sydney 28 Feb. 3/4: Perhaps the residents have been so thoroughly ‘fine-drawn’ they've not a ‘mag’ left for Maggotty.
[UK]Kendal Mercury 17 Apr. 6/1: Ven a cove vould drop you a meg, he vould tell you to lay it out to the best advantage, like as if the blueing of it would take an halfternoon.
[UK]Hotten Dict. of Modern Sl. etc.
[UK]R. Nicholson Rogue’s Progress (1966) 129: I emerge from Whitecross Street without a mag.
[UK]Leaves from Diary of Celebrated Burglar 104/1: She repeatedly overhauled her breast and ‘kick’ without a sign of a ‘mag’ coming to light.
[UK]J. Greenwood Wilds of London (1881) 114: I shan’t have a mag left for a glass of gin in the morning.
[Aus]Morn. Bulletin (Rockhampton, Qld) 18 July 2/6: A half-penny [...] may find the following; ‘bawbees,’ ‘browns,’ ‘camden town,’ ‘coppers,’ ‘ flatch,’ ‘gray,’ ‘madge.’ ‘make,’ ‘mag or maga,’ ‘posh,’ and ‘rap’.
[Scot]Dundee Courier 13 June 7/5: You’re a brick, Fred [...] Taint every mate would have paid his last meg for a chap like me.
[UK]H. King Savage London 27: He put his hands into his pockets and turned them out. ‘Not a blessed mag!’.
[Aus]C. Crowe Aus. Sl. Dict. 48: Mag, a half-penny.
[UK]G.F. Northall Warwickshire Word-Book 139: Mag, Meg. A half-penny.
[UK]Mirror of Life 4 Nov. 3/1: [T]he loser [...] was left on the field without a ‘mag’ to go home with.
[UK]Sporting Times 24 Feb. 1/3: ‘They got nothing,’ he chuckled, ‘not a solitary rap, for fortunately—I repeat, fortunately—I had lost every mag I had on the last race.’.
[Scot]Dundee Eve. Teleg. 19 July 2/4: [A] halfpenny is a ‘brown’ or a ‘madzer (pronounced ‘medzer’), ‘saltee’ [...] ‘mag,’ ‘posh,’ ‘bawbee,’ or ‘rap’.
[UK]I. & P. Opie Lore and Lang. of Schoolchildren (1977) 175: A halfpenny is a ‘meg’ or ‘rusty meg’.

2. a penny, a cent.

[UK] ‘Sonnets for the Fancy’ Egan Boxiana III 621: In Leicester Fields, as most the story know, / ‘Come black your worship for a single mag.’.
[UK]‘Knowing Bill’ in Rake’s Budget in Spedding & Watt (eds) Bawdy Songbooks (2011) III 86: Salt cod I sell a vind a pound, / Red herrings twelve a flag / I sometimes hinguns cries around, / A quart, sir, for a mag.
[UK]London Mag. Feb. 2/1: Timon — (sotto voce) Haven’t seen the colour of a ‘mag’ yet.
[UK]Kendal Mercury 3 Apr. 6/2: A thrum of wins (threepence), and a meg for some sulphur and a flash of lightning (glass of gin).
[UK]Dickens ‘Slang’ in Household Words 24 Sept. 75/2: Pence [are] browns, or coppers and mags.
[UK]Leaves from Diary of Celebrated Burglar 7/2: I have been ‘barbered’ by some one while I was asleep, and every bloody ‘mag’ in my ‘kick’ is ‘namassed’.
[UK]Sporting Times 10 Apr. 1/2: ‘I have asked fifteen of those women [...] for a bit, and not a mag did I get’.
[UK]Binstead & Wells A Pink ’Un and a Pelican 278: Fleet Street can possibly ‘give a bit of weight’ to most places as a ‘run for the utterly magless, rapless and pebble-beached’.
[Aus]‘Rolf Boldrewood’ In Bad Company 214: There’s no fun in watchn’ of bloomin’ shearers makin’ their pound and thirty bob a day while we can’t raise a mag over three-and-six.
[US]F.H. Tillotson How I Became a Detective 89: A ‘meg’ is a penny and ‘20 megs’ is 10 cents.
[US] Wash. Post 28 Mar. n.p.: The word comes from the slang of the street arab, who has a name for every coin. A ‘meg’ is a cent, a ‘jit’ or ‘jitney’ is a nickel, a ‘dimmo’ is a dime, and a ‘cute’ is a quarter.
[US]M. Prenner ‘Sl. Terms for Money’ in AS IV:5 357: A cent, which is a red or a meg.
[US]D. Maurer Big Con 301: meg. A one-cent piece, used in the smack.
[US]Goldin et al. DAUL 138/1: Meg. (Sing, and pl.) A cent; a penny.

In compounds

mag-flying (n.)

playing pitch and toss.

[UK]Leaves from Diary of Celebrated Burglar 7/2: Mag-flying [...] consists in tossing or twinkling in the air two pence or half-pence. The two-pence or half-pence are placed upon a small flat piece of wood [...] tail uppermost, and thrown up in the air with a twinkling motion, caused by the twist given to the piece of wood, at the time of parting from it; if they fall head uppermost the tosser wins whatever bet there may be on it; if tail appears he loses, if one head and one tail, he tosses over again.
[UK]Daily Tel. 26 Mar. 2 col. 8: Of the twenty-nine ‘night charges,’ by far the greater number were of... boys for mag flying, i.e. ‘pitch and toss’ [F&H].
[UK]D. Powis Signs of Crime 192: Magflying Playing pitch and toss.

In phrases

spin the mags (v.)

(Aus.) to gamble by tossing halfpence, to play pitch and toss.

[Aus]Sydney Monitor 25 Feb. 4/4: Why, spinning the mags, your worship, is slang for toss-half penny. [...] Constable Sutland then entered into a detail of rise and fall, in a direct line of a string of halfpence, which were arranged on a flat piece of wood, to enable the twirler to give an equal gravitation to each ; of the cries uttered by the byestanders of ‘6d. on heads!’ ‘3d. on tails!"’of the picking up and putting down of money, &c.