Related Clues:

• 'Why did I think that?'
• "Boy, am I dumb!"
• 'Duh!'
• ''I should've known better''
• ''What a fool I am!''
• 'What was I thinking?'
• Verbal alternative to a head slap
• [Headslap]
• "I was so foolish!"
• "D'oh!"
• 'What a fool I am!'
• 'Gosh, what was I thinking?!'
• 'D'oh!'
• 'Boy, am I a dope!'
• "I am a fool!"