Related Clues:

• 'Put a sock in it!'
• 'That's enough out of you!'
• ''Pipe down!''
• Silencer
• Librarian's admonishment
• "Shh!"
• Moviegoer's reprimand
• Lullaby word
• It'll shut you up
• It can fall over a crowd
• Breath-holding crowd reaction
• ''Zip your lip!''
• ''No talking!''
• "Quiet, you!"
• Urge to be quiet