The result of someone who has had surgery of the anus to make it look like a vagina. The poonass still functions like a regular ass, but offers visual features that are attractive to bulldykes and heterosexual experimentative males.
Johnny's poonass looks just like a real vagina!
by Alex Knight April 26, 2005
5 Words related to poon ass
Adj; a dumb retard who thinks they are the shit but in reality they are the biggest pussy ever. no one really likes them and they truly have no friends
trey: yo u wanna go chill witt chris royalty??
Dom: naw ma nigga he a poon ass
by b nastii July 31, 2009

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