jackfuck
A person who is so dumb they belong in a club for people who are dumb.
My math teacher is a jackfuck. He joined a club called 'The Dumbest People in the World.'
My brother is a jackfuck. He joined a club called 'The People Who Think They're Smart.'
My friend's mom is a jackfuck. She joined a club called 'The People Who Talk Too Much.'