1 definition by Steve-O McQueev-O

A condition where one has a tiny penis, under 3 inches in length.
Jess: Do you want to have sex?
Dan: Okay.
Jess: Sorry, I don't smoke.
Dan: HEY! That's my penis!
Jess: That's your penis Dan? Oh my God, it is tiny! You have a micropenis!
by Steve-O McQueev-O February 2, 2010
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