mum's the word
US /mʌmz ðə wɜrd/
UK /mʌmz ðə wɜrd/
1.
acqua in bocca, silenzio
keep quiet; say nothing
:
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Don't tell anyone about the surprise party, remember, mum's the word!
Non dire a nessuno della festa a sorpresa, ricorda, acqua in bocca!
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When it comes to our secret project, mum's the word.
Quando si tratta del nostro progetto segreto, acqua in bocca.