生死看淡不服咱就干
[shēng sĭ kàn dàn bù fú zán jiù gān]
It's an aggressive and nonchalant declaration that can be interpreted as defying life and death challenges or opposition. Literally means 'if you don't accept it then we'll see who comes out on top'. This is quite colloquial, indicating one’s defiance and determination despite life adversities or competitions.