Related Clues:

• 'Whoops!'
• 'Boy, am I stupid!'
• Simpleton's utterance
• Homer Simpson exclamation
• Sarcastic response
• Homer Simpson's exclamation
• Play-___
• 'Of course!'
• Comment made while slapping the forehead
• 'Stupid me!'
• 'Like, I get it'
• Note
• Self-deprecating utterance
• Cry from Homer Simpson
• 'How stupid of me!'