When you go to pee and end up pooping a little bit too. Or vice versa, when you go to poop and end up peeing simultaneously.
Monica went to the restroom because she needed to go pee. Once she started to urinate, a little bit of poop began to come out simultaneously. She didn't even realize she had to poop...she ended up peeooping.
when you spend your life on bebo and go around other peoples profiles, read their comments/look at their pictures for no reason other than you're nosey
Scott: "Aww, well i don't think they go out anymore cos i was just y'know, peboing and she said 'fu, we're over.'"