who died and made you boss

Phrase

Sarcastic response to somebody assuming a position of authority that they have not earned.

Japanese Meaning

自分の立場に資格がないのに、他人に命令や指示をしようとする相手に対して、皮肉を込めて「誰が死んでお前に命令を出させたんだ？」と問いただす表現

Before you start telling us what to do, who died and made you boss?

私たちに指示する前に、一体誰があなたを上司にしたの？

Sense（1）

Sarcastic response to somebody assuming a position of authority that they have not earned.