Related Clues:

• 'Fat chance!'
• Rebuttal to 24-Across
• 'Just kidding!'
• 'A likely story!'
• Down-home turndown
• 'No dice'
• 'That'll show 'em!'
• 'I don't believe it!'
• When hell freezes over
• 'Baloney!'
• 'Nonsense!'
• '___ too shabby'
• See 62-Down
• 'Good one!'
• 'Uh-uh!'