one's lips are sealed
One will not tell anyone else; one is keeping a secret.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“Don't worry, my lips are sealed about your secret.”
“I know you want to know who won the award, but my lips are sealed until the ceremony.”
“Although the detective pressed him for details regarding the incident, the witness remained firm, insisting that his lips were sealed.”
- 01
abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.
Last updated August 10, 2026