The phrase "exposure secret" can have several synonyms depending on the context. For instance, if the secret relates to a scandalous matter, it may be referred to as a "skeleton in the closet", "dirty laundry" or "dark secret". Conversely, if the secret is of a positive nature and you wish to share it publicly, you might use phrases such as "finally letting out the truth" or "revealing a long-kept secret". Other synonyms for "exposure secret" include "uncovering the truth", "letting the cat out of the bag", "disclosing information" or simply "sharing the truth". Overall, the choice of synonym will depend on the desired connotation and level of secrecy attached to the secret being exposed.