Related Clues:

• 'You gotta be kidding!'
• Emphatic denial
• 'That's impossible!'
• 'Forget it!'
• 'Shucks!'
• 'Nothing doing!'
• Cry of disbelief
• 'Darn it!'
• 'I don't believe it!'
• 'Fuhgeddaboudit!'
• 'I don't buy it'
• ''Good grief!''
• Emphatic refusal
• "When pigs fly!"
• 'You can't be serious!'