Let's not overlook the third possibility of "breathtakingly immature."
As much as Fisher is trying to stick up for Winston now, Fisher's eyeroll when Winston came out of the locker room dressed in full uniform and pads for the Clemson game -- the game for which Winston was suspended -- said it all. In that moment, you could practically hear Fisher saying to himself, "Wow, I really am dealing with one of the dumbest human beings alive."