Related Clues:

• Noted cartoon catchphrase
• "Silly me!"
• 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
• "A merry heart ___ good like a medicine" (Proverbs 17:22)
• Homer Simpson's cry
• Word from Homer Simpson
• ''Simpsons'' exclamation
• Interjection added to the O.E.D. in 2001
• Catchphrase introduced around the same time as 'don't have a cow, man'
• Accomplish, biblically