open secret
US /ˈoʊpən ˈsiːkrət/
UK /ˈoʊpən ˈsiːkrət/
1.
secret de Polichinelle
a fact that is supposed to be secret but is actually known by many people
:
•
It's an open secret that they are planning to get married.
C'est un secret de Polichinelle qu'ils prévoient de se marier.
•
His affair with his assistant was an open secret in the office.
Sa liaison avec son assistante était un secret de Polichinelle au bureau.