Green’s Dictionary of Slang

unit n.

1. (orig. Aus) a person; a thing.

[Aus]Sun. Times (Perth) 29 Apr. 1/1: Larrikins are painfully prevalent on the Midland Junction line [and] a unit has small chance of fair play at their hands.
[US]Baker et al. CUSS.
[US]50 Cent ‘Wanksta’ 🎵 We in the club doing the same ol’ two step / Gorilla unit cause they say we bugged out / Cause we don’t go nowhere without toast we thugged out.
[US](con. 1972) Jurgenson & Cea Circle of Six 58: [E]ach unit individually raised his nightstick, tapped his shield, and said, ‘Remember Cardillo’ .
[Aus]N. Cummins Tales of the Honey Badger [ebook] I was a big unit. hit the earth at around 10 pounds and wasn’t short of admirers if I remember correctly.
[US]D. Winslow ‘Sunset’ in Broken 211: ‘You’re a weak unit who gets himself beaten up’.

2. the vagina.

[US]J. Wambaugh Choirboys (1976) 283: He said he’d like to rebush somebody by sticking a picnic ham in her unit and pulling the bone out.

3. the penis.

[US]E.E. Landy Underground Dict. (1972).
T. Wolff ‘Bullet in the Brain’ in The Night in Question 204: [H]er unembarrassed carnality, and especially the cordial way she had with his unit, which she called Mr. Mole.
[UK]Roger’s Profanisaurus in Viz 87 Dec. n.p.: unit n. Penis. As in: ‘I slipped her my unit.’.
[US]Eight Hand Reviews ‘Devinn Lane’s Succulent Blossom’ Adult Novelty Reviews 🌐 These silly devices seem to all carry the same Modus Operandus. That is; lube up, insert, stroke ’till your unit pukes up it’s [sic] love juices.
[US]Simon & Burns ‘Combat Jack’ Generation Kill ep. 4 [TV script] He can jerk off to anything. I’ve seen him punishing his unit during a screening of Pocahontas.
[US]J. Stahl Bad Sex on Speed 74: The hard-but-ragged unit, still going in and out, is now numb as a frostbit foot.

4. (orig. US campus, also female unit) a girl, a woman.

[US] W. Safire What’s The Good Word? 304: We can pound a few brews and scope the local units (who are all too often grimbos).
[US]Eble Campus Sl. Mar. 3: female unit – girlfriend.
[Aus] www.thepantsman.com 🌐 Group after group of tidy young units strolling past on warm nights, wearing next to nothing.
[Aus]L. Redhead Peepshow [ebook] Are you fucked in the head, woman? [...] You have got to be the stupidest fucking unit I have ever met.

5. (US) used in compound to denote a given type, determined by the additional noun.

[US]D. Jenkins You Gotta Play Hurt 64: I enclosed a note. ‘Yo, Captain Hipness: Hope this thread is bad enough to wear to a pizzafest. [...] Love. The Dad Unit’ .
D. Jenkins Slim & None 173: I said, ‘I’ll grant you he can pass for a surf unit, but he’s never done anything but play golf’.

6. (UK black) a physically imposing individual.

annotation to genius.com 🌐 Side note: There are few MCs that are physically as big as MC Det. Man’s a unit.
[Aus]G. Gilmore Base Nature [ebook] He was bent and grey with faded eyes, but you could see he’d been a unit in his day.

7. (US drugs) a single measure of cocaine.

Young Jeezy ‘Me OK’ 🎵 34 a unit, nine hundred a O.