Thusiasm: The opposite of enthusiasm. An overwhelming desire to do nothing. To never want to go over and above the minimum effort required to complete a task. Just can't be fucked (CBF). To have had the life sucked out of you by the world leaving you a shell of the person that you used to be with no desire to do anything other than the absolute bare minimum to survive.
After being treated like shit by his boss for months Johns thusiasm level was so high that he could barely be bothered to breathe.