Jack Barf
A person so dumb they think a jack barf is a type of sandwich. They don't know their own face.
My brother is a Jack Barf. He said the moon is made of cheese and that it's 'kinda sad.'
My teacher called me a Jack Barf because I put glitter in my coffee and it exploded.
My friend is a Jack Barf. He tried to date a cow and got kicked out of the barn.