Related Clues:

• Show defiance
• 'How ___ you?!'
• Start of a prank, maybe
• Chance it
• Draw a line in the sand, perhaps
• Call one's bluff
• Defy
• Beard
• It's for those who can't handle the truth
• 'Make my day,' e.g.
• "Dr. Livingston, I ---"
• Issue a challenge to
• Show spunk
• Fitting suggestion?
• "Dr. Livingstone, I ---?"