Related Clues:

• 'Ain't happenin'!'
• Impossible to set-up broadcast opportunity
• and 14 Down: The world only dreamed of the judgment on the Flying Dutchman?
• Not at all, informally
• Not even a single time
• 'No way, José' (and, incidentally, when you should say that to someone named José)
• Ultimatum retort
• Certainly not close to autumn, the night before last in summer
• 'Never ever!'
• Without any chance
• When pigs fly in one vertically
• Definitive denial
• �Surely you�re kidding!�
• 'Don't even go there!'
• Succinct version of the combined final words of the starred answers