Related Clues:

• ''Uh-uh''
• Conditional words
• ''Nah''
• Phrase spoken by 16-Across
• Slangy dissent
• Negative slang word
• Casual denial
• ''I don't think so''
• "Yeah, right!"
• Terse refusal
• 'Like that would ever happen!'
• "Like that would happen!"
• "Not gonna happen"
• 'Fat chance'
• "I don't think so"