Related Clues:

• Slightest concern
• Word of disapproval
• Serenade the ump
• Respond to a bad call
• Half a gaffe?
• Frightening sound
• Startling shout
• It causes many to start
• Scary cry
• Holler's mate
• Reaction to a bad joke
• Shout to startle
• Fan's thumbs-down
• 'No fair!'
• Express displeasure