ftw = For The Win

Well I agree with califdadof3
But it depends on the sentence itself
That means if the sentence says ''Go ahead love jayybee FTW!'' then that means as califdado3 said: for the win..
But if it was something like ''I don't care what people think'' then that means another thing... which actually I don't think I am allowed to even say that word over here :P I think you got it right? ;)

Ftw= for the win and ftw can also mean what the heck backwards and wtf= What the F***

For the win like what they would say in basketball when you know it's for the win

Hola todos

(AHEM) Not that I agree with this but in some terms it can mean f*** the world. Of course as everyone has already mentioned it can mean for the win.