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
Bo (1)	-	Swedish, Danish
Ekene	-	Western African, Igbo
Brecht	-	Dutch
Yakov	YAH-kahf (Russian)	Hebrew, Russian, Bulgarian
Ackerman	['ækəmən]
Bine	-	Danish