it means: shut the f*ck up, change your f*ckin sig b!tch or get the f*ck out and die in a f*ckin fire, in my mother f*ckin opinion never underestimate the power of google
I know Shut the **** up, Get the **** out, die in a ****ing fire and In my ****ing Opinion but for the life of my i cant think of or find what cysfb stands for lol