날 보고

at me

→ 나+를
phrase Rare #14,812
at me 날 is the contracted form of 나를 (“me”), and 보고 comes from 보다 (“to see” or “to look”). It commonly means “looking at me” or “seeing me,” especially before another verb; on its own, it can mean “look at me!”
KO: 강아지가 날 보고 꼬리를 흔들었어요.
EN: The puppy wagged its tail when it saw me.

날 보고 짓는 거 죠

You're smiling at me, right?

— 저수지의 개들 (1992)

발은 날 보고 카슨을 봤어

Bal saw me, and I saw Carson.

— 미스틱 리버 (2003)

날 보고!

Look at me!

— 위플래쉬 (2014)

날 보고 짓는 거 였어요

You were smiling at me.

— 저수지의 개들 (1992)