Related Clues:

• ''Ha!''
• 'That doesn't surprise me!'
• 'Uh-huh, yeah, sure'
• "Ain't happening"
• 'Can't help ya!'
• ''Forget it''
• Skeptic's rejoinder
• "Negatory!"
• Gary Cooper's refusal to work in Tyneside
• Denial honest, then back to front
• Expression of doubt
• Exclamation of disbelief
• Scoffing comment
• "Ain't gonna happen!"
• ''That's not gonna happen''