知るか

how should I know?; who cares?

→ 知る
phrase Common #2,831
how should I know?; who cares? 知るか is usually a blunt, dismissive expression rather than a neutral way to ask “do you know?” It can express irritation, indifference, or refusal to answer. The form is informal and can sound rude.
JA: そんなこと、俺が知るか!
EN: How should I know about that?!

そんなこと知るか

How should I know?

— グッドフェローズ (1990)

知るか

How should I know!

— ANORA アノーラ (2024)

大昔のテレビ俳優なんか知るか

Who gives a damn about some TV actor from ages ago?

— ワンス・アポン・ア・タイム・イン・ハリウッド (2019)

何言ってる危険なのを知ってた知るかそんなの

What are you talking about? How was I supposed to know it was dangerous? I don't know anything about that.

— タクシー運転手 約束は海を越えて (2017)

そんなこと知るかこいつをどこへ

How the hell should I know? This guy… where are you taking him?

— ほんとうのピノッキオ (2019)

知るか

How should I know?

— シカゴ (2002)

知るか

How should I know?

— ANORA アノーラ (2024)