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The sexual organ of a person of unrecognizable gender. Also, a person with such a personality that they represent both sexes.
Guy 1: Dude, Clarissa has a vapenaginis.
Guy 2: Dude, who's Clarissa?
Guy 1: (Points) That girl over there.
Guy 2: Dude! That's my best friend Eric!
by Joey January 20, 2005
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