Jacaiden - A person who has a brain the size of a peanut, a head like a

A person who has a brain the size of a peanut, a head like a boiled egg, and a habit of being a total jerk with a knot on their head.

Tweet: "My neighbor is a Jacaiden. He fights with the dog."

DM: "You're a Jacaiden. You're lucky I didn't hit you."

Text: "He got suspended for no reason. He's a Jacaiden."