날 만난

met me

→ 나+를
phrase Rare #16,358
met me 날 is an informal contraction of 나를 (“me”). 만난 is the past attributive form of 만나다 (“to meet”), so 날 만난 modifies a following noun or clause, as in 날 만난 걸 (“having met me”).
KO: 날 만난 건 정말 행운이에요.
EN: Having met me is really lucky.

날 만난 행운으로 알아요

Consider yourself lucky to have met me.

— 피키 블라인더스: 불멸의 남자 (2026)

그럼 왜 날 만난 거 죠?

Then why did you meet me?

— 빅 식 (2017)

날 만난 이라 생각해

Think of meeting me as a dream.

— 블라인드 멜로디 (2018)