Possible Clues:

• Blanket refusal
• Retort of denial
• Defensive retort
• 'Nuh-uh!'
• Formal response to "Have the time?"
• "Negative"
• Defensive response to an accusation
• Indignant denial
• "That's untrue about me!"
• Words beginning 32 assertions in Dr. Seuss' 'Green Eggs and Ham'