Related Clues:

• 'I just realized I messed up' outburst
• 'What a dope I am!'
• Forehead-slapping interjection
• 'I thought that was obvious!'
• Homer exclamation
• "How dumb of me!"
• 'Of course, you idiot!'
• Homeric cry
• Homer Simpson outburst that sounds like the first syllable of his favorite food
• Word that means the same thing if you put 'no' in front of it
• 'Even *I* knew that!'
• Homeric grunt of annoyance
• Outburst accompanying a facepalm
• 'It couldn't be more obvious!'
• Homer's "Heck!"