Mum’s the word.
[Idiom] MUM’S THE WORD. - How to Signal Keeping Secrets
Keep the secret.
'Mum’s the word' is a phrase used to indicate that one should keep quiet, remain secretive about the given topic, or not reveal any pertinent information. It is a lighthearted way to enforce confidentiality and is often used in situations where discretion is necessary.
Example Sentences
She told them about the surprise party and then said, 'Mum's the word.'
She told them about the surprise party and then reminded them to keep it a secret.
When asked about the secret project, he replied, 'Mum's the word.'
When asked about the secret project, he responded to keep it a secret.
We were warned not to spill the beans, so it was mum's the word from everyone.
We were warned not to disclose the secret, so everyone kept it a secret.
