싶은 거

what you want

→ 싶다
phrase Rare #18,180
what you want 거 is a shortened form of 것 (“thing”) and refers to what someone wants to do, have, or say, depending on the preceding verb.
KO: 먹고 싶은 거 있어?
EN: Is there anything you want to eat?

나가고 싶은 거 다 알아.

I know you want to go out.

— 조조 래빗 (2019)

뭐 하시고 싶은 거는 요?

What do you want to do?

— 어바웃 타임 (2013)