Related Clues:

• "That smarts!"
• Comic-strip cry of pain
• Audible reaction to a punch
• Punch line
• [That punch hurt!]
• Socked-in-the-gut sound
• Sock-in-the-gut response
• Reproachful remark
• Cartoonish cry
• Reaction to a slug
• Response to ''Pow!''
• Cartoony yell if your butt's on fire and you're running in circles
• Belt reaction
• 'Man, that hurts!'
• Response to a wedgie, perhaps