Top definition
When one decides to pass gas from their anus and it happens to be slightly moist, elaving a brownish spray of poo in their panties.
Named after Benny, who did the wettest farts in the world. Can also be shortened purely to Benny
"Oh no, I think I just did a Benny. Quick, check my pants!"
by GillyBean May 07, 2005
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