anything to lose잃을 게 is a shortened form of 잃을 것이, meaning “something or anything to lose.” It is especially common in the expression 잃을 게 없다, meaning “to have nothing to lose.”
KO: 이제 잃을 게 없으니 한번 도전해 볼게요.
EN: Now that I have nothing to lose, I’ll give it a try.