Related Clues:

• "Dream on!"
• Expression coined by a crapshooter
• Doubting riposte
• Sarcastic exclamation
• "Out of the question"
• 'Yep' opposite
• 'Ain't happening'
• Yup's antonym
• Opposite of "yup"
• 'Not gonna happen'
• Opposite of 49-Across
• "Not in a million years!"
• Cynical response
• Skeptical retort
• 'Yeah, like that'll ever happen'