keep (one's) lips sealed

To not say anything (about something); to keep (something) a secret. Please keep your lips sealed about our engagement, we aren't ready to tell everybody just yet.

Common Names:

Name	Pronounced	Usage
Ketill	-	Ancient Scandinavian
Candi	KAN-dee	English
Aniyah	-	English (Modern)
Prudentia	-	Late Roman
Fflur	-	Welsh
Karin	KAH-rin (Swedish, German, Dutch), KAH-reen (Finnish), KER-ən (English), KAR-ən (English)	Swedish, Norwegian, Danish, German, Dutch, Finnish, English