뭘 알아

what do you know?

→ 뭐+를
phrase Common #2,983
what do you know? Often used rhetorically to dismiss or challenge someone, with the sense “what would you know?” The subject can vary with context.
KO: 네가 뭘 알아?
EN: What would you know?

당신이 뭘 알아?

What do you know?

— 롤라 런 (1998)

당신들이 뭘 알아?

What do you know?

— 엠 (1931)

네가 뭘 알아

What do you know?

— 크리에이터 (2023)

네가 뭘 알아?

What do you know?

— 음식남녀 (1994)

그 사람들이 뭘 알아?

What do those people know?

— 홍등 (1991)

자기가 뭘 알아?

What do you know?

— 그레이트 뷰티 (2013)

당신이 뭘 알아!

What do you know!

— 특별한 날 (1977)

그에 대해서 뭘 알아?

What do you know about him?

알긴 뭘 알아

What do you know?

— 어 퓨 굿 맨 (1992)