Related Clues:

• 'Forget it!'
• 'Can't do it'
• 'Fat chance!'
• 'Uh-uh!'
• 'Fuhgeddaboudit!'
• 'Ixnay'
• 'Forget about it!'
• ''Nothing doing!''
• 'Sorry, Charlie'
• 'Ain't gonna happen'
• ''Uh-uh!''
• "Forget it!"
• ''Forget it!''
• "Sorry"
• Futile, informally