have nothing to lose
US /hæv ˈnʌθɪŋ tu luːz/
UK /hæv ˈnʌθɪŋ tu luːz/

1.
没有什么可失去的, 无所畏惧
to be in a situation where you cannot make things worse by trying to achieve something, so you should try
:
•
I decided to apply for the scholarship; I have nothing to lose.
我决定申请奖学金;我没有什么可失去的。
•
Go ahead and ask her out. You have nothing to lose.
去约她出去吧。你没有什么可失去的。