Green’s Dictionary of Slang

1. (also pooney) the vagina; also the male genitals.

1968		‘Richard Hooker’ M*A*S*H (2004) 217: Didn’t do nawthin’ but hoot, holler, drink rum and chase that native poon!
1975		J. Wambaugh Choirboys (1976) 282: Confidentially, what’d her poon look like, Father?
1979		‘Iceberg Slim’ Airtight Willie and Me 147: Your horny Pa ain’t gonna get another shot at your poonie.
1985		‘Jennifer Blowdryer’ Modern English 73: genitalia: female (n): Poonage (as in poontang).
1989		J. Morton Lowspeak.
1990		Eble Campus Sl. Nov. 7: pooney – male or female genitals.
2003		‘The Cooter Monologues’ at www.pinkhairedgirl.com 20 Jan. 🌐 Poontang/Poon. [...] You gotta say it with a lot of Os, like ‘Pooooooooooontang.’ Phil uses it like a vagina/sex reference, like, ‘Must obey the poon.’.
2006		F.X. Toole Pound for Pound 277: Chicky continued to sleep alone. No pie, no poon.
2021		J. Ellroy Widespread Panic 57: Half these babes peddled their poon.

2. a general term of abuse.

1940		(E. Curry) Hysterical History Aus. 104: It would appear that a huge and pompous Governmental Ball was to be held at a large hall in Surry Hills (which locality, as you know, my dear little peripatetic poons, was an extremely fashionable and exclusive one in those days).
2001		OnLine Dict. of Playground Sl. 🌐 poon-tang adj. vagina, also used as ‘dude you are a poon’ (scared) usually said with dislike.

3. a woman or women in general when seen purely in a sexual context.

1957		M. Shulman Rally Round the Flag, Boys! (1959) 131: You’ll find more poon per square inch in hick towns than in any big city.
1989		C. Hiaasen Skin Tight 256: Creature from the Black lagoon, and still he gets more poon than me.
1990		(con. early 1950s) J. Ellroy L.A. Confidential 99: McPherson liked colored poon.
2000		M.E. Dassad ‘Chickenhawk’ at www.cultdeadcow.com 🌐 I [...] flipped on the light switch and tackled the little cheerleader poonie, throwing her onto her back on the bed that filled most of the small room.
2004		C. Hiaasen Skinny Dip 215: Ain’t been widowed a week and aleady he’s pokin’ poon.
2020		C. Hiaasen Squeeze Me 114: ‘Check out all the poon on the beach. Too bad they don’t allow topless’.

4. (US gay) the anus.

1972

B. Rodgers Queens’ Vernacular 19: the rectal opening, anus [...] poon.

5. sexual intercourse.

1989		H. Rawson Dict. of Invective (1991) 308: poontang. Sexual intercourse or a woman regarded as a sex object; poon in short.
1997		C. Hiaasen Lucky You 121: He didn’t want Chub distracted by a Hooters babe or any other woman until they collected the lottery money. Then there’d be plenty of time for wild poon.
2002		J. Ellroy ‘Little Sleazer & the Mail-Sex Mama’ in Destination: Morgue! (2004) 167: She [...] made her marks from plaintive pleas for poon.