1.   After wrecking the season, those guys are hereby ordered to keep mouths zipped.

2.   If the emotionally vacant employee frequently interrupts others, he could try to consciously zip his mouth shut until someone else finishes speaking.

3.   The teacher introduced me and instructed her charges to sit in their chairs, zip their mouths and open their ears in a cadence well familiar to the children.

4.   So Thaksin must zip his mouth and listen.