Related Clues:

• 'That's a lie!'
• Informal denial
• Slangy refusal
• Wrong
• Slangy turndown
• 'Forget it!'
• 'Don't think so'
• 'Huh-uh'
• Nah
• False
• '___ fast!' ('Hey!')
• 'Nah!'
• Slangy denial
• 'Uh-uh'
• 'Fat chance!'