Related Clues:

• Spoken word that's a sound trademark of 20th Century Fox
• Classic catchphrase
• Blunderer's cry
• "How stupid of me!"
• Just so-so
• Underwhelmed grunt
• 'Simpsons' word added to the OED
• Dropped-donut reaction for Homer
• "Simpsons" word added to the OED
• 'Boy, am I an idiot!'
• So-so, so to speak
• 'I could take it or leave it,' slangily
• “Who cares”
• Head-slapper's cry
• 'I am an idiot!'