self-anointed

adjective

self-anoint·​ed ˌself-ə-ˈnȯin-təd 

: chosen or designated by oneself : anointed by oneself

a self-anointed prophet

Colorado's radio airwaves most weekend mornings teem with self-anointed financial experts telling you how to manage your money, when, in fact, some of them have had problems managing their own.

—David Migoya

Word History

First Known Use

1851, in the meaning defined above