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
Georgius	-	Ancient Greek (Latinized)
Mikkjal	-	Faroese
Midas	MIE-dəs (English)	Greek Mythology
Morven	MAWR-ven	Scottish
Aurea	-	Late Roman
Margrethe	-	Danish, Norwegian