" past master "

1: a person with a high level of knowledge or skill in a field;

  * e.g., " ... a movie director who was widely regarded as the past master of suspense "

•  Synonyms : 

•  ace,

•  adept,

•  artist,

•  authority,

•  cognoscente,

•  connoisseur,

•  crackerjack,

•  dab,

•  dab hand,

•  expert,

•  fiend,

•  geek,

•  guru,

•  hand,

•  hotshot,

•  maestro,

•  master,

•  maven,

•  meister,

•  proficient,

•  scholar,

•  shark,

•  sharp,

•  virtuoso,

•  whiz,

•  wizard

•  Antonyms : 

•  amateur,

•  inexpert,

•  nonexpert