Related Clues:

• "You're kidding!!"
• "Can it!"
• "Shh!" (and a hint to the feature shared by the answers to starred clues)
• "Stop talking!"
• 'Shhh!,' not so politely
• Closing statement?
• "Zip it!"
• 'Shut up!' ... or a phonetic hint to this puzzle's theme
• Rude command to stop talking
• Rude order to stop speaking
• Close your mouth!
• Rude order to stop talking
• Make nothing of it, by the sound of it
• Close to eat of late around the shed
• TUH's close to this