Related Clues:

• 'Nah!'
• Slangy denial
• 'Uh-uh'
• 'Don't sweat it'
• 'Over my dead body!'
• 'Nope'
• 'No sirree'
• 'Fat chance!'
• Rebuttal to 24-Across
• Down-home turndown
• 'No dice'
• When hell freezes over
• 'Uh-uh!'
• 'I don't think so'
• Yep's opposite