pudden head

/ˈpʊdən ˌhɛd/
noun
  1. A person who is slow to understand or foolish; a simpleton.
    • Don't be such a pudden-head; the answer is obvious.
    • The teacher called him a pudden-head when he couldn't solve the easy puzzle.
    • He felt like a pudden-head for forgetting his keys again.