Used when you got a huge booger on your finger and whip it on the ass on some asshole oh makes fun of you for pickin your nose.
Jake: hey what that on Ian's ass?
Jon: Oh, thats Travis's booger.
Travis: Yeah, he was being a Douche so i gave him a Booger Butt.
when you blow your nose on toilet paper first and then wipe your butt with it and the boogers get stuck in your butt and when you fart a snot bubble comes out.
person 1: is it wrong to wipe your butt with the same piece of toilet paper you blew your nose with?
person 2: nah man, that just makes you a booger butt.