거 아는데

I know that …, but

→ 것
phrase Rare #28,458
I know that …, but The phrase often introduces a contrasting point or request. The part before 거 describes what the speaker knows.
KO: 네가 바쁜 거 아는데, 잠깐 도와줄 수 있어?
EN: I know you’re busy, but could you help me for a moment?

말도 안 되는 거 아는데 그날 밤에 핸드폰 쓸 수 있는 건 나 말고 너 밖에 없잖아

I know it sounds ridiculous, but that night, you were the only one besides me who could use a phone.

— Unlocked (2023)

야, 석도 야 내가 너 진짜 못 말리는 거 아는데 여기는 가리봉동이 아니라니까

Hey, Seokdo, I know you’re impossible to stop, but I’m telling you, this isn’t Garibong-dong.

— The Roundup (2022)