Jack Big Potato
A person who thinks they're the center of the universe, but they're just a smelly, ugly potato who forgot to brush their teeth.
My cousin is Jack Big Potato. He thinks he's a king, but he can't even tie his shoes.
My dad called my mom Jack Big Potato because she tried to cook and it looked like a science experiment.
My friend is Jack Big Potato. He thinks he's a rockstar, but he just sings in the shower.