KPIP Share definition Flag Keep Pee-pee In Pants. Seems to mostly be a problem with drunk guys at the bar. Drunk guy: I'm so wasted, my dick is huge, check me out. Less drunk guy: Duuuude, KPIP! KPIP by kaiselin October 25, 2011 0 0 Get merch Get the KPIP mug. Buy Now — $32.95 See more merch