Related Clues:

• Whoops!
• [Headdesk]
• Oaf's cry
• Homer Simpson's exasperated cry
• Homer Simpson's utterance
• Word indicating Homer's blown it again
• Slap-on-the-head cry
• Homeric outburst?
• "I'm such an idiot!"
• Cry with a head slap
• Simpson's interjection
• Homer Simpson's contribution to the OED
• Slap-on-the-forehead cry
• 'I blew it,' to Homer
• First note in sol-fa scale