Related Clues:
- 'Boy, am I stupid!'
- Simpleton's utterance
- Sarcastic response
- 'Of course!'
- Comment made while slapping the forehead
- 'Like, I get it'
- Self-deprecating utterance
- 'How stupid of me!'
- 'How could I be so dumb?'
- Opinion opener
- 'What a dope!'
- ''Well, that's completely obvious!''
- 'Of course, blockhead!'
- "You don't say!"
- Forehead-slapper's cry