Acronym for Post Ejaculation Urination.
After having an ejaculation one often feels the need to urinate very badly and occasionally cannot.
Happens most often when one has ejaculated multiple times in one day.
"Damn man! Last night I beat my meat like four times, and after that I couldn't fuckin' piss for hours!" - Jimmy
"Sounds like you had a P.E.U." - Thomas