Related Clues:

• 'You gotta be kidding!'
• Bill the Cat pronouncement, in the funnies
• 'Horrors!'
• Emphatic denial
• 'Whoops!'
• 'Yikes!'
• 'Yecch!'
• 'It can't be!'
• 'Holy cow!'
• 'Yuck!'
• 'Holy mackerel!'
• Cry of despair
• 'Oops!'
• Gagging cry
• 'Shoot!'