keep one's mouth shut

Be quiet; don't reveal confidential information. For example, The teachers told us to keep our mouths shut during the entire presentation, or You can't tell Carol anything; she's incapable of keeping her mouth shut. Also see hold one's tongue.

Common Names:

Name	Pronounced	Usage
EmÍLia	-	Portuguese, Slovak, Hungarian
Theudhar	-	Ancient Germanic
Kyrsten	-	English (Rare)
Aldin	-	Bosnian
Mimi	-	English, Italian
Pompilius	-	Ancient Roman