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
Alojzija	-	Slovene, Croatian
Fredrika	fred-REE-kah (Swedish), FRED-ree-kah (Finnish)	Swedish, Finnish
Conrad	KAHN-rad (English), KAWN-raht (German)	English, German, Ancient Germanic
Carlisle	KAHR-liel	English
Salambek	-	Chechen
Merlyn	MUR-lin	English