big shot

idiomatic

Japanese Meaning

（俗語）大物、有力者、権力者など、重要な人物を指す。 / （俗語）一世一代の大チャンス、極めて重要な機会を意味する場合もある。

After his promotion, he started acting like a big shot and bossing everyone around at the office.

昇進してから、彼は大物のように振る舞い、オフィスでみんなに命令するようになった。

Sense（1）

(idiomatic) A person with a reputation of importance or power.

They stopped traffic so some big shot and his entourage could have the whole road to themselves.

Sense（2）

(idiomatic) A rare and significant chance to achieve fame or success.

her one big shot at the brass ring

big shots

（ plural ）