Someone who wears ass on their head like a crown, so they can feel like the king of ass.
What a freakin' asscrown!
by Izelik November 16, 2004
A king of asshats, usually refering to someone that goes beyond the extreme in terms of asshattery / the most douchebag person you know.
Guy: "Man, You are the king of asshats... You're an asscrown!"
by DeadEndX May 05, 2009