Related Clues:

• Little brat
• Buttinsky, e.g.
• Spammer, for one
• Holy terror
• Mosquito, e.g.
• Unwelcome visitor
• Exterminator's quarry
• 4-Down, e.g.
• Constant interrupter
• Little annoyance
• Persistent annoyer
• Rotten tot
• Problem for parents
• Bothersome one
• Sitter's bane