Related Clues:

• Skeptic's comment
• 'Really?'
• 'Oh, really?'
• 'For real?'
• 'You don't say'
• "No kidding!"
• ''Really?''
• 'Are you serious?'
• "No kidding?"
• 'Is that a fact?!'
• "Really?"
• "You don't say"
• "Oh yeah?"
• ''Is that so?''
• ''Oh, yeah?''