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when your penis is washed either by the wetness of a girl's mouth or by the wetness of the girls vagina. Also, may be used as a wager in a friendly bet.
I'm so glad I'm hanging out with Shirley tonight because I know I will get my pean washed.

Dude, that girl is such a slut I know I can get my pean washed tonight.

I'll bet you a pean wash that you can't fuck that girl tonight.
by mypeanisclean September 03, 2009
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