mum's the word

US /mʌmz ðə wɜrd/
UK /mʌmz ðə wɜrd/
"mum's the word" picture
1.

boca de siri, silêncio

keep quiet; say nothing

:
Don't tell anyone about the surprise party, remember, mum's the word!
Não conte a ninguém sobre a festa surpresa, lembre-se, boca de siri!
When it comes to our secret project, mum's the word.
Quando se trata do nosso projeto secreto, boca de siri.