Clam up and Cool it

Clam up verb - To stop talking.

Cool it and clam up are semantically related in calm topic. In some cases you can use "Cool it" instead a verb "Clam up", when it comes to topics like silence, make or be quiet.

Cool it verb - Become quiet or calm, especially after a state of agitation.

Clam up and cool it are semantically related in calm topic. Sometimes you can use "Clam up" instead a verb "Cool it", if it concerns topics such as silence, make or be quiet.