Related Clues:

• Tough guy's rhetorical question
• 'You don't say?!'
• Doubter's remark
• ''Oh yeah?''
• Skeptic's response
• 'Oh yeah?'
• ''For real?''
• 'Oh really?'
• 'Is it?'
• "No kiddin'?"
• "Never would have thought"
• "Huh, really?"