self-appointed
adjective /ˌself əˈpɔɪntɪd/
/ˌself əˈpɔɪntɪd/
[usually before noun] (usually disapproving)- giving yourself a particular title, job, etc., especially without the agreement of other people
- self-appointed experts
Oxford Collocations DictionarySelf-appointed is used with these nouns:- guardian
- task