Related Clues:

• 'Life ___ short ...'
• ''Are not!'' comeback
• Response to a naysayer
• "Nope!"
• '___ sorry!'
• Rejoinder in a kids' argument
• Playground denial
• Retort to ''Are not!''
• "Am not!" retort
• Response to "Am not!"
• Reply to 'You are not!'
• Playground rebuttal
• Sandbox retort
• 'You are not!' retort
• 'Am too!' rejoinder