lips are sealed, one's

One will reveal nothing, especially about a secret. For example, You can trust me with the details of the lawsuit-my lips are sealed. [Early 1900s]

Name	Pronounced	Usage
Jacek	YAH-tsek	Polish
Kylie	KIE-lee	English
Melanie	MEL-ə-nee (English), ME-lah-nee (German)	English, German, Dutch
Blagorodna	-	Macedonian, Bulgarian
PÁNfilo	-	Spanish
Wigstan	-	Anglo-Saxon