Definition from Wiktionary, the free dictionary
bigwig (plural bigwigs)
- (jocose) A person of importance to a group or organization
- The company bigwig is gathering his staff together for a meeting today.
- big cheese, big enchilada, big kahuna, big wheel, grand poobah, head honcho, kingpin, muckety muck, top banana, top dog, VIP
A person of importance