Possible Clues:

• Cry of derision
• Unhappy fan's shout
• Shout of derision
• Heckler's shout
• "You need new glasses, ump!"
• "I don't like your performance!"
• Half an ouchie?
• Serenade the ump
• "I'm not a fan of this!"
• Shout to a hiccuper