For a certain cause such as laughing, fear, or waiting to long you pee without warning into your pants making a visible stain where your pee was running depending on what your wearing.
i had a friend over, he was playing a one-player game. i stood behind him, and i just started peeing. "oh my god, i just peed my pants" i said. my friend didn't belive me so i showed my jeans. i like peeing myself
by Mr.troopmom June 22, 2009
when you're so overwhelmed with joy or laughter that you could quite easily pee your pants. not to be confused with literally peeing yourself. it's a hypothetical situation that almost never happens.
liv: hey did you see that the new harry potter comes out july 15th?
sara: i know, i could totally pee myself!
sara: i know, i could totally pee myself!
by LIFEisBEAUTIFUL May 14, 2009