Related Clues:

• Warning sound
• Word of rejection
• 'How awful!'
• Unhappy fan's reaction
• 'That's terrible!'
• 'Eeew!'
• Haughty response
• 'Gross!'
• 'Disgusting!'
• Cry of disgust
• Blow off steam
• Boo
• Serpentine sound
• Sibilant sound
• 'Sick!'