Related Clues:

• Defiant retort
• ''No you're not!'' retort
• Child's retort
• Retort to a skeptic
• '___ dead!' (worried teen's words)
• ''You are not!'' reply
• Retort to "You are not!"
• Playground defense
• Comeback to 'You are not!'
• Reply to 'You're not even smart enough to be in fourth grade'
• "You are not!" retort
• '-- solemnly swear ...'
• Emphatic assertion
• Recess rebuttal, perhaps
• Defense of one's bona fides, on the playground