Acting like George Bush, i.e., generally being an evil jerk. Coined by David Letterman (or his writers, anyway), May 5, 2009 episode.
Did you hear after frightening NYC by strafing Manhattan with Air Force One and a couple of fighter planes, the White House has decided not to release the photographs? I don't know. I think they're Bushin' it up a bit on that one.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).