Related Clues:

• Cat sound
• Derisive sound
• Boo follower
• Greeting for a villain
• React to a bad performance?
• Villain's reception
• Snake's sibilant sound
• Angry cat sound
• Disapproving sound
• Cat's ''Back off!''
• Sign of hostility
• Sound from a mad cat
• Angry audience reaction
• Announce the villain's arrival
• Serpent's warning