Related Clues:

• Cartoon word said while wincing
• 'Dang it!'
• Exclamation from a blockhead
• 'Am I an idiot!'
• Bart Simpson hears it a lot
• Homer Simpson utterance
• Noted cartoon catchphrase
• "Silly me!"
• "Well, __-di-dah!"
• Response to dropping donuts and so forth
• 2001 OED addition that cites "The Simpsons"
• "Am I an idiot!"
• Word spoken with a head slap
• Homer holler
• Cry accompanying a head slap