Green’s Dictionary of Slang

four adj.

SE in slang uses

In derivatives

foursome (n.)

(US) four people involved in sex together; it can involve any combination of genders.

[US]J.H. Burns Lucifer with a Book 91: Nydia and me got used to foursomes in hotel bedrooms. Understand, chum? Anything goes at our house.
[US]Alt. Eng. Dict. [Internet] foursome (compound noun) four people involved in sex together. Refers to any combination of gender.
Leontiades & Figart Husband Swap [ebook] Our one foursome experience had been really rather awkward [...] swapping partners midway meant different rhythms and different preferences .

In compounds

four bars (n.)

(US black) a short time.

[US](con. 1930s) D. Wells Night People 66: Baby, all I want is four bars after the gig.
four-cornered (adj.) [elaboration of SE cornered]

(US prison) caught in the act.

[US]Bentley & Corbett Prison Sl. 92: Four Cornered A person who is caught redhanded committing a crime.
four corners (n.) [four-corners, a crossroads and thus a small settlement that might grow up around it]

(US) a small, out-of-the-way place.

[US]H. Rawson Dict. of Invective (1991) 306: East Jesus, four corners, ghost town.
four-eye/-eyed/-eyes

see separate entries.

four-fingered shuffle (n.)

masturbation.

‘The World’s Largest Collection of Male Masturbation Synonyms’ at Worldwidewank.com [Internet] Four-knuckle shuffle (for those who lost a finger in ’Nam).
‘FAQ’ on alt.sex.masturbation [Internet] 88 Rubbin’ the rigid rod / 89 Playing pocket pool / 90 Four fingered shuffle.
four fizzy (n.)

(UK black) a .44 weapon.

[UK]K. Koke ‘Destiny’ [lyrics] Four fizzy sitting by my side like a western.
Skepta ‘Round Here’ [lyrics] Four fizzy in the air / One shot, two shot, three shot, clear.
four-flush/-flusher

see separate entries.

four-Fs (n.)

see separate entry.

four-half (n.)

a mix of ale and porter, sold at fourpence a quart.

[UK]Islington Gaz. 17 Sept. 3/4: The possibility of obtaining a pot o’ four-half might have proved one great attraction.
[UK]J. Diprose London Life 42: His favourite beverage is a ‘pot o’ four arf’.
[UK]Lincs. Chron. 11 Aug. 6/2: I’ll lay a dollar as he can’t drink a quart of four-half’s quick as I can.
[UK]Ally Sloper’s Half Holiday 3 May 2/1: Against [...] ‘Burden and Heat of the Day’ poor dear Pa has noted ‘Four-half’ [...] I myself should have suggested champagne cup.
[UK] ‘’Arry on His Critics’ in Punch 17 Dec. 280/1: I’m ‘Fiz,’ not four ’arf, my dear feller.
[UK]Sporting Times 22 Mar. 2/2: One who would do well in the four-half or ‘London pongelo’ department.
[Aus]Bulletin (Sydney) 3 Mar. 25/2: [T]he gallery night by night with flopping tears waters the flowers on the garden-hats in the stalls and cultivates droughts that only deep wells of ‘four half’ can dissipate.
R. Free Seven Years Hard 69: Then I took ’im to the nearest pub., and told ’im to put a name to it. ‘Four-half,’ says he. ‘Pint o’ four-half, miss,’ says I.
[UK]T. Burke Nights in Town 304: They would offer lavish apologies and pots of four-’arf.
[UK]‘Sapper’ Final Count 810: Three of four-’alf, please, Miss.
four-headed (adj.)

(US black) very clever, exceptionally intelligent.

[US]C. Major Juba to Jive 180: Four-headed adj. (1930s) possesing great mental or magical abilities.
four-letter man/word (n.)

see separate entries.

four piece (n.) [there are four pieces in total]

(US prison) a complete set of metal forms of restraints, i.e. cuffs, leg irons, waist chain, and security cover.

[US]Other Side of the Wall: Prisoner’s Dict. July [Internet] 4 piece: A full set of restraints (cuffs, leg irons, waist, and security cover). (IA).
four pound (n.) (also 4-pound)

(US black) a gun.

[US]Hip-Hop Connection Aug. 21: 4 pound ‘We represent everyday with the 4-Pound,’ rapped someone or other. Another word for gun.
four prices (adj.) [? it costs fig. ‘four times as much’ as a normal item]

(Ulster) very expensive.

[Ire]Share Slanguage.
fours up (n.)

sexual intercourse involving two couples.

[UK]I. Welsh ‘A Smart Cunt’ in Acid House 253: I was into fours up, no question about it.
four thick (n.)

beer sold at fourpence a quart.

[UK]J. Ware Passing Eng. of the Victorian Era 136/2: Four thick (Public-house). Fourpence per quart beer—the commonest there is (in London), and generally the muddiest. [Ibid.] 162/2: When your kick is empty, and your mouth is dry, your blooming pals will not give you a yannep to get a drop of four thick.

In phrases

four sisters on thumb street (n.)

(US black) masturbation.

[US]E. Folb Runnin’ Down Some Lines 237: four sisters on thumb street Masturbation.
[US]Anoninsac ‘Friendly Fuck’ [Internet] I needed to get laid. No really. I’m not just saying that. I really did need to get laid. Sometimes Missy Thumb and her four sisters just aren’t good enough.
go four (v.) [card-playing imagery]

(Aus.) to support, to back up.

[Aus]Bulletin (Sydney) 22 Dec. 13/4: Anyhow, I’ll go four on the robin.