past master
noun /ˌpɑːst ˈmɑːstə(r)/
/ˌpæst ˈmæstər/
- a person who is very good at something because they have a lot of experience in it synonym expert
- Director Mel Smith is a past master of this kind of comedy.
- past master at doing something She's a past master at getting what she wants.
- past master at something They are past masters at this game.