Related Clues:

• "A likely story!"
• Skeptical exclamation
• Sarcastic reply to an assurance
• 'That'll be the day!'
• "Baloney!"
• 'Like that's gonna happen!'
• Doubter's scoff
• "Yeah, right"
• “Yeah, right”
• "Fat chance!"
• "No way!"
• "Don't think so"
• "I don't think so!"
• "Sez who?"
• Skeptic's retort