When asked whether Jay Cutler could ever beat him, Ronnie replied that Jay would have to "die and be reborn with better genetics" in order to beat him. That's shit-talking, and it's cocky (and was ultimately proven untrue).
These guys all talk shit. In fact, if they didn't they might not believe they themselves had a shot to beat one another.
That was Gunter, he was talking about. Gus' shit talking is coming out the ass like he is already on top, the only thing he has are great tris.