self-styled
adjective [ before noun ] usually disapproving uk/ˌselfˈstaɪld/ us/ˌselfˈstaɪld/
自封的;自称的
given a name or title by yourself without any official reason for it
Television news appears to be full of self-styled "experts" who are happy to give their views on subjects that they actually know very little about. 媒体上似乎满是自封的“专家”，他们乐于对自己实际上知之甚少的话题发表见解。