jackamaroon
a person who is so dumb they make a donkey look smart. like a brain that was hit by a brick.
He thinks he's a rockstar. He can't even play the guitar. He's a jackamaroon.
She tried to cook. She set the kitchen on fire. She's a jackamaroon.
He thinks he's a scientist. He said water is made of cookies. He's a jackamaroon.