benny wet fart

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 7, 2005