pmp Share definition Flag pissing my pants; or peeing my pants a way to express laughing other than lol, rofl, or lmao Guy 1: Omg, did you watch the Hangover? Guy 2: Yes! Dude, I was pmp.Girl 1: lmaoo omg so funny Girl 2: hahahaha pmp pmp by Leynie December 16, 2010 0 0 Get merch Get the pmp mug. Buy Now — $32.95 See more merch