daffy-twacker
A complete mess, a brainless joker, a person who can’t keep his pants on and can’t stop laughing at his own stupidity.
My brother is a daffy-twacker. He laughed so hard he fell off the couch.
My friend’s mom called him a daffy-twacker because he ate a whole pizza in one bite.
My teacher said I was a daffy-twacker for drawing on the walls with my crayons.