keep mum
Don't say anything
To keep mum is to stay silent, especially about something you know but shouldn't reveal: Keep mum about the surprise party.
The phrase implies discretion or secrecy rather than simply not speaking.
Mum here is an old word for silence, possibly imitating the sound of closed lips.
- clam upAbruptly stop speaking
- zip itCommand to stop speaking
- zip your lipCommand to stop talking
- shut upDemand for silence
- be quietCease making noise
hush · hold your tongue · sub rosa · sworn · non-disclosure · lips sealed · bite one's tongue · breathe a word · loose lips · covertness · button up · close up · discretion · mute · confidentiality · concealment · reticence · silent
keep mumblab
Divulge indiscreetly
spill the beans · tell all · let the cat out of the bag · speak up · reveal
keep mumblab
Divulge indiscreetly
spill the beans · kiss and tell · squeal · gossip · run one's mouth
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