Related Clues:

• Opposite of 49-Across
• Opposite of "yep"
• "Sorry, can't"
• 'Uh-unh'
• "Forget about it"
• "Nothing doing"
• "Not gonna happen!"
• 'You're mistaken'
• 'Sorry, dude'
• "Ain't happening"
• 'Can't help ya!'
• ''Forget it''
• "Negatory!"
• Gary Cooper's refusal to work in Tyneside
• Denial honest, then back to front