Satan is an evil being, maybe physical or maybe a spiritual entity. Either way, it's some bad stuff. In the binary of good and evil, he is definitely the latter, the darkness to the supposed light we are trying to strive towards. Some people like that, though. They even worship the thing. No shame in that. Maybe you even want it on a tee. This vintage shirt, nicely worn in and faded, lets everyone know you secretly worship Satan.