내가 뭐

what did I...?

→ 나
phrase Uncommon #8,851
what did I...? A colloquial expression used when asking what one did, missed, or can do; on its own, 내가 뭐? can mean “What, me?” or “What about me?”
KO: 내가 뭐 잊은 거 있어?
EN: What did I forget?

내가 뭐 도와줄까?

How can I help you?

— 컨트롤 (2007)

내가 뭐?

What am I?

— 죽은 시인의 사회 (1989)

내가 뭐 틀린 말 했어요?

Did I say something wrong?

— 리턴 (2003)

내가 뭐 놓친 거 있어?

Did I miss something?

— 빅 식 (2017)

내가 뭐 했지?

What did I do?

— 불릿 트레인 (2022)