A Buttfuck
A buttfuck is a brainless idiot who either constantly annoys people or actually has butt sex. Most of them are just brainless idiots.
My friend is a buttfuck. He talks to himself and thinks he’s the king of the world.
My neighbor is a buttfuck. He has butt sex with his dog and thinks he’s cool.
My teacher is a buttfuck. She thinks she knows everything, but she doesn’t.