Green’s Dictionary of Slang

broom n.1

[synon. with brush n.4 ; note early 17C broom, a horse’s tail]

1. a woman; the inference is of promiscuity.

[UK]J. Wight Mornings in Bow St. 185: He never meets my wife, Mrs. Wingrove, but he cries — ‘Here's a charming young broom!’ when my wife is not a charming young broom [...] but as honest a woman as ever broke bread.

2. the pubic hair; of male pubic hair, ext. as womb broom.

[US](con. early 1950s) J. Peacock Valhalla 83: Hugh sketchily contemplated shaving his womb broom off but decided against it. If it tickled it tickled.

3. the female genitals.

[UK]Farmer & Henley Sl. and Its Analogues.

4. (also womb broom) the penis.

[Ire]P. Howard Curious Incident of the Dog in the Nightdress 243: Her eyes go straight to the old womb broom, which is on duty.

5. (US black) a cigar [resemblance to a small SE broomstick].

[US] in ‘The Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.

SE in slang uses

In compounds

Broomtown (n.) [ety. unknown]

(US) an area of town inhabited mainly by white people only.

[US]L. Pettiway Workin’ It 89: Darrin and I are living on Benjamin Street, down Conshohocken and Benjamin. They call it the Flats. It’s Broomtown. It’s all white.

In phrases

cop a broom (v.)

(US black) to leave quickly, to rush away.

[US]Louis Jordan ‘You Run Your Mouth and I’ll Run My Business’ 🎵 But dig this spiel I’m going to lay on you, gate, / Don’t cop your broom, park the body and wait.
[US]D. Burley Orig. Hbk of Harlem Jive 136: Cop a broom — To leave hurriedly.
hang out the broom (v.) [the tradition of hanging out a broom to announce that one’s wife was absent and thus advertise for a temporary housekeeper]

of a man, to admit to one’s being cuckolded.

[UK]R. Dixon Canidia v 29: He trusts abroad, and he trusts at Home, / Rich Goods and Bastards take up Room. / Alas, saies the Bawd, it was his doom, / Poor man, let him hang out the Broom.