Possible Clues:

• Expressed displeasure, as for an opposing team
• "Cheered" for the villain
• Expressed disapproval over and over in the sack
• Vocalized one’s displeasure
• Razzed a performer
• Audibly disagreed with a ref's call
• Disagreed loudly
• Responded to a bad call
• Hissed go-with
• Displayed disfavor