Zip up your lip!

Zip (up) your lip(s)!

slang Stop talking; shut up. A: "But Mom, I don't want to go!" B: "Zip your lip, Charlie! You're going to math camp, and that's final!" All right, everyone, zip up your lips! I don't want to hear another sound until the presentation is over.
See also: zip

Zip (up) your lip!

and Zip it up!
exclam. Be quiet!; Zip up your mouth! Shhhh! Zip up your lip! Zip it up and keep it zipped.
See also: up, zip