Related Clues:

• "Double-dog" challenge
• Say "Bet you can't!"
• "Solve the rest of this puzzle Downs-only," e.g
• Blatant challenge
• "Bet you can't!" is one
• Have the audacity
• 500 are to be brave
• 'I double-dog ___ you!'
• "How ___ you!"
• Take a bold chance
• Have the gall
• Impetus for going streaking, perhaps
• Taunter's challenge
• 'I __ you!'
• "I __ you!"