Related Clues:

• 'When pigs fly!'
• 'Forget it!'
• See 35-Across
• Flightless birds
• 'Fuhgeddaboudit!'
• Thumbs-down
• 'Absolutely not!'
• 'How could you even ask such a thing?!'
• 'Unh-unh'
• Denial
• 'Out of the question'
• 'Fuhged-daboudit!'
• 'Fuggedaboudit'
• "Forget it!"
• 'You must be joking'