Related Clues:

• "Huh-uh"
• Reject, slangily
• "Ain't gonna happen"
• 'No go'
• Casual rejection
• "Can't help ya"
• Yeah's opposite
• Pig Latin refusal
• "Dream on!"
• 'Can't be'
• Slangy turndown, and a hint to how 17-, 22-, 32-, 47- and 51-Across are formed
• 'Yep' opposite
• 'Ain't happening'
• ''I don't wanna''
• "Never mind"