Related Clues:

• Word accompanying a head slap
• "Well, that's obvious"
• 'How dumb of me!'
• "Oh no, stupid me!"
• "That was stupid of me!"
• [Facepalm]
• 'Thanks, Captain Obvious'
• 'I'm such a moron!'
• "I'm such a moron!"
• Homer Simpson's syllable
• 'How stupid am I?!'
• "How stupid am I?!"
• [Head slap]
• Play ___ (fun clay)
• Homer Simpson's word