skeleton in the closet 不可告人的秘密

Skeleton in the closet

Meaning: Someone with "skeletons in their closet" is someone who has something they don't want to tell you about.

一个“在衣橱里藏着骷髅”的人是有着不可告人秘密的人。

Example: Everyone has a skeleton in the closet.

每个人都有不可告人的秘密。