big wheel
US /bɪɡ wiːl/
UK /bɪɡ wiːl/

1.
大人物, 重要人物, 有影响力的人
an important and influential person, especially in a company or organization
:
•
He thinks he's a big wheel in the company, but nobody really listens to him.
他以为自己是公司里的大人物,但没人真正听他的。
•
The new CEO is a real big wheel in the tech industry.
新任首席执行官是科技行业的真正大人物。