Related Clues:

• Gadfly
• Annoying one
• Little brother, maybe
• Yapping dog, e.g.
• D-Con target
• Bug bomb target
• Buttinsky, e.g.
• Spammer, for one
• Mosquito, e.g.
• Unwelcome visitor
• Exterminator's quarry
• Constant interrupter
• Persistent annoyer
• Bothersome one
• Bothersome type