Related Clues:

• 'Shaddup'
• ''Shut your mouth!''
• 'Zip your lips!'
• "Put a lid on it!"
• "Zip your lip!"
• Theater admonishment
• 'Shut your hole!'
• Shut up!
• Keep quiet aboard ship
• Be quiet!
• Sh!
• Holmes mouthpiece getting blue leading to gag order
• Sound heard in a movie theater
• Library warning
• Lower one's racket