Значение идиомы mum is the word

[mum is the word] You must keep the secret; keep silent; don’t tellanyone. — Often used as an interjection.

We are planning a surpriseparty for John and mum is the word.

«Mum is the word!» the robbercaptain told his men.



Run out.
Предлог of с примерами.


Значение идиомы mum is the word