Post-Ejaculation Piss Stream. The unpredictable and, often, messy stream of piss that normally consists of multiple trajectories experienced shortly after ejaculation in males. It is advised to squat closer to the toilet bowl to ensure that all of your piss makes it in if you know you are at risk of a wild PEPS.
"Yo, why so long in the bathroom?"
"I pissed all over the place because I beat off right before."