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A poon moon occurs when a woman purposefully flashes her vagina at someone. This is usually a joke, not an invitation for sex.
That little bitch thought she had me when she showed her ass, but I retaliated with a poon moon, and we both know who won that war!

The guys at work are always flashing their balls, and since I don't have them I joined in with a poon moon!
by Moltov Cocktease August 11, 2010
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When a girl is on all fours and you can see her ass and vagina from the back.
Dude I asked that volley ball chick for nudes and she sent me a poon moon shot.

Yeah I asked her for some also but she just sent me a shot of her vag and it was beet red, like she was abusing it.
by Phil Smooth October 30, 2017
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