past master[noun]Synonyms: expert, artist, artiste, authority, master, professional, proficient, virtuoso, whiz, wizard
[TahlilGaran] English Synonym Dictionary ▲
ˌpast ˈmaster noun [countable] someone who is very skilled at doing something and has done it many times before
Synonym : expertpast master at (doing) something
She’s a past master at exploiting other people. [TahlilGaran] Dictionary of Contemporary English ▲