skeleton in the closet
US /ˈskel.ɪ.tən ɪn ðə ˈklɑː.zɪt/
UK /ˈskel.ɪ.tən ɪn ðə ˈklɑː.zɪt/

1.
不可告人的秘密, 家醜
a shameful or embarrassing secret from the past that someone wants to keep hidden
:
•
Every family has a skeleton in the closet.
每個家庭都有一個不可告人的秘密。
•
His past arrest was a skeleton in the closet he hoped no one would discover.
他過去的被捕是他希望沒人會發現的不可告人的秘密。