A fuckin' stinky substance which builds up under your Bell end if you dont clean it regularly. (Guys who generally have a foreskin).
After being ill for a few days in bed, Adam found that he had a large collection of Piotrish (Smegma) waiting to be cleaned underneath his bellend.
by Terry Silver & My Minions December 05, 2006
vagina, female gentalia, snatch, muff, beaver, pussy, twat, cunt, poontang, hair-pie, fur-burger, axe-wound.
Ouch, that hit her right in the piotrish.
by Skipton Petrocelli August 08, 2005

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