What is Over-sharer?
Over-sharer definition and meaning on Dictionary terms:
verb (used with or without object), oA.verA.shared, oA.verA.sharA.ing,
to disclose too much (personal information) or too many (details) about oneself: She overshared about her new boyfriend today, and we were both embarrassed.
an instance of this: Get ready for an overshare about his health problems.