トップガン

noun

top gun; big cheese; top dog

Slangy loanword for a top performer, ace, or the most important person in a group. Often used in business, sports, or competitive contexts.

• 彼かれは営えい業ぎょう部ぶのトップガンだ。

  He's the top gun in the sales department.

• あの選せん手しゅはチームのトップガンとして活かつ躍やくしている。

  That player is performing as the team's top gun.