BIGWIG

kingpin, top banana, bigwig

(noun) the most important person in a group or undertaking

Source: WordNet® 3.1

Etymology

Noun

bigwig (plural bigwigs)

(jocular) A person of importance to a group or organization.

Synonyms

• big cheese, big enchilada, big kahuna, big wheel, grand poobah, head honcho, kingpin, muckety muck, top banana, top dog, VIP

Source: Wiktionary

Big"wig`, n. Etym: [Big,a.+ wig.]

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition