a. 自己任命的
在线英汉词典

self-appointed的短语、例句：

self-appointed adj[usu attrib 通常作定语] having decided to be sth, usu without the agreement of others 自封的（通常指未经他人认可的）
a self-appointed judge, expert, critic, etc 自封的裁判、 专家、 评论家等.