Related Clues:

• Conditional words
• Phrase spoken by 16-Across
• "Yeah, right!"
• Terse refusal
• 'Like that would ever happen!'
• "Like that would happen!"
• 'Fat chance'
• Teen's catchphrase
• "Ixnay"
• "A likely story!"
• 'Get real!'
• "Yeah, right!" in teenspeak
• "Not a chance!"
• 'That'll be the day!'
• "In your dreams!"