Related Clues:

• 'I am such an idiot!'
• ''I should've thought of that!''
• Contemporary lament
• Homer Simpson grunt
• Simpsonian institution?
• "How dumb can I be!"
• 'I'm such a dope!'
• ''No kidding, stupid!''
• 'Isn't that obvious?!'
• "How silly of me!"
• "Like, how did I make THAT mistake?"
• Quote from Homer
• ''I should've known that!''
• ''Simpsons'' shout
• Homer Simpson's 'Drat!'