1. (noun) an asshole that is stupid
2. (noun) Justin Beiber
3. (noun) one's head after it is defecated upon
Bill: Did you see that prepubescent faggot Beiber singing love songs and dancing around like a wind-up monkey?
Joe: Oh yeah, that butt-plug. He's a shithead. And it literally looks like he has a shithead.
Bill: I am pretty certain that he did probably pull his head out of some guy's asshole.