big wig

基本解释

Actually it was a big wig.
确实是大人物。
She wore a new hairpiece every day and was considered a big wig.
她每天都戴着新假发，以为自己是个大人物。
In George Washington’s day, it was in vogue to wear a great big wig.
在华盛顿时代，戴一头华丽的假发是当时的时尚。

Big wig businessmen take schools that are falling apart, financially buying them, and put them on the Wall Street market for a pretty profit.
FORBES: For-Profit Colleges Are Not The Problem, State Schools Are
He wore a wig like a big woolly hat, a red floppy bow tie, a yellow speckled vest, and a black coat, and he was emphatically gesturing with white-gloved hands.
NEWYORKER: Mr. Bones
For many years parking meters held no fear for Cruzians because a clown, wearing rainbow-striped pants, a wig and a big red nose would drop coins, gratis, into meters about to expire.
FORBES: Booby Prize

If you refer to an important person as a bigwig, you are being somewhat disrespectful.