Answer: shutup

AnswerCrossword Clue
SHUTUP

Put a cork in it!

SHUTUP

"Pipe down!"

SHUTUP

Button your lip!

SHUTUP
"Can it!"
SHUTUP
"Zip your lip!"
SHUTUP"Close yer face!"
SHUTUP"Not another word out of you!"
SHUTUP"Close your trap!"
SHUTUP"Zip it!"
SHUTUPRestraining order?
SHUTUPSilence
SHUTUPStop talking: Colloq.
SHUTUPCease speaking: Colloq.
SHUTUPClose.
SHUTUPImprisoned.
SHUTUPPeremptory command.
SHUTUP... shop.
SHUTUPConfine
SHUTUPBe quiet!
SHUTUPImprisoned
SHUTUP"Stop talking!"
SHUTUP"Shhh!," not so politely
SHUTUP"I've heard enough!"
SHUTUPKeep quiet!
SHUTUPStifle!
SHUTUP"Quit yakkin'!"
SHUTUPPipe down!
SHUTUP"Stifle!"
SHUTUPGag