open secret

US /ˈoʊpən ˈsiːkrət/
UK /ˈoʊpən ˈsiːkrət/
"open secret" picture
1.

공공연한 비밀

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.
그들이 결혼할 계획이라는 것은 공공연한 비밀이다.
His affair with his assistant was an open secret in the office.
그의 비서와의 불륜은 사무실에서 공공연한 비밀이었다.