Related Clues:

• Skeptic's challenge
• ''I'll bet!''
• Skeptical reply
• Scoffer's laugh
• Response of disbelief
• Disbeliever's comment
• 'Mmm hmm ...'
• 'Told ya so!'
• 'Su-u-ure'
• 'That's rich!'
• 'In your face!'
• "Fat chance"
• "I'll just bet!"
• 'Doubtful'
• 'LOL!'