Green’s Dictionary of Slang

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

1962		(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.
1969		B. Jackson Thief’s Primer 61: trim: (n) female pubic hair.
1975		E. Torres Carlito’s Way 11: I’ll get me that trim some other way.
1980		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.’.
1990		S. Morgan Homeboy 100: Flicking a bead of sweat from his lip [...] he could almost taste her toddler trim.
2001		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

1937		Robert Johnson ‘Little Queen of Spades’ 🎵 But she got a way of trimmin’ down, hoo fair brown, and I mean it’s most too tough.
1949		‘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.
1952		(con. 1948) G. Mandel Flee the Angry Strangers 29: She was good trimmin’, right enough.
1953		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.
1959		A. Anderson ‘Schooldays in North Carolina’ in Lover Man 100: I’ve had more trim than you’ll ever have.
1967		L. Bruce Essential Lenny Bruce 217: He gave up some bread for some trim.
1973		D. Goines Street Players 149: I might even end up buying me some trim.
1997–2000		Da Bomb 🌐 29: Trim: Men referring to attractive women in a social atmosphere like a dance club. Look at the trim near the bar.
2006		F.X. Toole Pound for Pound 257: They would [...] chase trim until they were cross-eyed.
		T. Pluck ‘Legacy of Brutality’ in Life During Wartime (2018) 62: ‘When you got the cash, the trim comes running’.

3. cunnilingus.

1961

Rigney & Smith Real Bohemia xvii: trim cunnilingus.