come out of the closet

verb2

1. •
   To disclose to others about one's sexual orientation, romantic orientation, or gender identity, where previously this had been kept secret.

   • He came out of the closet as gay to his friends.
2. •
   (informal, humorous) To self-disclose about one's minority or disapproved-of identity, belief, preference, etc.

   • She finally came out of the closet to her religious family regarding her atheism.