The foam in the bottom of a urinal that results from a particularly intense piss, most often after several alcoholic beverages. Can also be found when pissing on any hard flat surface(like the parking lot next to your buddy's car, after he was nice enough to get you out of the bar before you got yourself arrested for pissing on the juke box...again.)
"I am tired of my boss blaming me for the problems HE causes. As far as I'm concerned, he can suck pissfoam, choke on it, and die."
by Cornholio December 09, 2003
The Urban Dictionary Mug
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