lips are sealed

(one's) lips are sealed

One will not tell anyone; one will keep this a secret. Most often used in the expression "my lips are sealed." A: "Please don't tell anyone about this, I'm so embarrassed." B: "My lips are sealed." I told him not to say anything, and he said his lips are sealed, so hopefully he'll be able to keep a secret this time. Don't worry, I won't tell anyone you're planning to resign. My lips are sealed.
See also: lip, seal
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

(one's) lips are sealed

Used to indicate that one will not disclose a piece of information.
See also: lip, seal
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

lips are sealed, his/my

He/I will keep this secret. Although the idea of keeping one’s mouth tightly shut is much older and sealing up someone else’s lips dates from the late 1700s, this particular expression became current only in the early twentieth century. It was much repeated by Prime Minister Stanley Baldwin when asked about the rumored abdication of King Edward VIII, who wished to (and eventually did) marry a divorced American, Wallis Simpson. See also mum's the word.
See also: lip
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
See also:
References in periodicals archive ?
PD: My lips are sealed if it's 'off the record.' Credibility and integrity are important, if you want longevity in this business.
A GREAT White's lips are sealed as it nips out for some-fin to eat.
EDINBURGH-BASED DJ Jon Pleased, AKA The Visitor, has reworked the 80s classic Our Lips are Sealed.
Released on the highly respected Wall of Sound label, who have just celebrated 10 years of cool dance tunes, Our Lips are Sealed also features Roxanne Wilde, sister of 80's star Kim Wilde, on vocals.
SCHOOL'S out for summer and to help you make the most of those long holidays Dualstar Entertainment Group, Inc and Warner Home Video are releasing Our Lips Are Sealed, the fab all-new movie from those tween icons Mary-Kate and Ashley Olsen.
We have five copies of the video `Our Lips are Sealed' to give away to lucky Kids' Club members.
"My lips are sealed," said spokesman Tom Burke, upon returning an editor's call.