you've got nothing to lose idiom informal (also what have you got to lose?)
不会有任何损失；不会有任何坏处
used to say that you cannot make things worse, or cause any disadvantages for yourself by doing a particular thing
Why don't you take the job? You've got nothing to lose. 你为什么不接受这个工作？这对你不会有任何坏处。