Green’s Dictionary of Slang

trim n.

[? SE trim, neat, attractive, pretty]
(orig. US black)

1. a woman’s genitalia; the female pubic hair; thus meton. sexual intercourse.

[US](con. WWII) J.O. Killens And Then We Heard The Thunder (1964) 53: Any time you get that trim, that’s you. At least till another stud come along and beat your time.
[US]B. Jackson Thief’s Primer 61: trim: (n) female pubic hair.
[US]E. Torres Carlito’s Way 8: I’ll get me that trim some other way.
[US]E. Folb Runnin’ Down Some Lines 152: Terms like fluff for vagina and cotton or bush for female pubic hair suggest a woman’s [...] vulnerability at the hands of the male who ‘plucks her trim (vagina) clean.’.
[US]S. Morgan Homeboy 100: Flicking a bead of sweat from his lip [...] he could almost taste her toddler trim.
[US]G. Pelecanos Right As Rain 112: Maybe after that sundae, she might even give me some of that trim.

2. (also trimming) a woman, always in a sexual context; thus get some trim

[US]Robert Johnson ‘Little Queen of Spades’ [lyrics] But she got a way of trimmin’ down, hoo fair brown, and I mean it’s most too tough.
[US]‘Hal Ellson’ Duke 61: It was the Midnight Revue. Everybody plays jam in that park, gets their trim. We got on her. Seven of us.
[US](con. 1948) G. Mandel Flee the Angry Strangers 29: She was good trimmin’, right enough.
[US]W. Brown Monkey On My Back (1954) 44: Yeah, the trims went for Dave in a big way, but he didn’t pay them no mind.
[US]A. Anderson ‘Schooldays in North Carolina’ in Lover Man 100: I’ve had more trim than you’ll ever have.
[US]L. Bruce Essential Lenny Bruce 217: He gave up some bread for some trim.
[US]D. Goines Street Players 149: I might even end up buying me some trim.
[US]Da Bomb [Internet] 29: Trim: Men referring to attractive women in a social atmosphere like a dance club. Look at the trim near the bar.
[US]F.X. Toole Pound for Pound 257: They would [...] chase trim until they were cross-eyed.

3. cunnilingus.

[US]Rigney & Smith Real Bohemia xvii: trim cunnilingus.

In phrases

get some trim (v.)

of a man, to seduce, to have sexual intercourse.

[US]T.R. Houser Central Sl. 53: trim [...] Sex. ‘It’s Saturday, man, got to get some trim before Monday.’.
[US]P. Munro Sl. U.
[US]C. Stella Charlie Opera 54: Stay off the phone. Go get some trim or somethin’.