Related Clues:
- ___-proof (easy to operate)
- Teller of a tale 'full of sound and fury,' per Macbeth
- Senseless person
- Brainless sort
- Clot
- Box or proof preceder
- Definite Mensa reject
- Block-head
- Easily-manipulated type
- Simple guy
- Ass, nincompoop
- Ass, ninny
- Moron, fool
- Slang idiot with enlarged cranium?
- Silly person or dimwit