1 definition by iforgetmynamealot

The event in which a man is done peeing into a urinal, then zips the tip of his penis up in his zipper, causing an excrutiating pinching pain that results in loud sreaming and cursing.

The name derives from the penis getting trapped in the fly. Hence the name penis fly trap.
(two guys standing by seperate urinals, finishing up)

Man 1: AAAAAAHHHHHHHH!!!!!

Man 2:WHAT?!?!

Man 1:PENIS FLY TRAP!

Man 2:Ouch...
by iforgetmynamealot May 20, 2010
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