가 뭔데

what is …?; what makes … so important?; who are you to …?

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phrase Common #5,610
what is …?; what makes … so important?; who are you to …? The phrase can ask what something is or, when directed at a person, challenge their authority or standing. The latter use can sound confrontational.
KO: 발사대가 뭔데?
EN: What is a launch platform?

발사대가 뭔데?

What is a launch pad?

— 크리에이터 (2023)

매트가 뭔데?

What is a mat?

— 당갈 (2016)

그거 비밀번호가 뭔데 이 새끼 야!

What’s the password, you bastard!

— The Roundup (2022)

뭐, 총기가 뭔데?

What is a firearm, anyway?

— Time to Hunt (2020)

근데 홈페이지가 뭔데?

But what is a homepage?

— 퍼펙트 블루 (1998)