Related Clues:

• ''I don't think so!''
• ''Fuhgeddaboutit!''
• ''Think again''
• ''Oh, sure!''
• 'Yup' opposite
• Cynical comment
• 'Ain't gonna happen'
• "What a crock!"
• 'Oh yeah, uh-huh!'
• 'Dream on!'
• 'Forget about it'
• "Don't bother"
• Informal rejection
• ''As if!''
• "No way"