Jackaboon
A person who thinks they're the most intelligent person in the room but acts like a baboon who just got hit by a truck and still doesn't know why.
My uncle thinks he's a philosopher because he once said, 'Life is like a sandwich, but I don't like pickles.'
My friend tried to be a teacher and drew a stick figure on the board and called it 'modern art.'
My cousin thinks he's a king because he once threw a tantrum in public and got a free ice cream.