bigwig Meaning, Definition & Usage

  1. noun the most important person in a group or undertaking
    kingpin; top banana.

WordNet

Big"wig` noun
Etymology
Big,a.+ wig.
Definitions
  1. A person of consequence; as, the bigwigs of society. Jocose
    In our youth we have heard him spoken of by the bigwigs with extreme condescension. Dickens.

Webster 1913