Related Clues:

• 'Get real!'
• Curt turndown
• "Yeah, right!" in teenspeak
• "Not a chance!"
• 'That'll be the day!'
• "In your dreams!"
• 'Like that's gonna happen!'
• "Oh, you wish!"
• "Yeah, right"
• 'Clueless' expletive
• 'Don't think so!'
• Opposite of 15-Across
• "Yeah, like that'll ever happen"
• "Fat chance!"
• "No way!"