A person who is permanently designated as a "No Shirt" is one that has been through many negative situations, problems, mishaps, dilemmas, stress, and vibe throughout his/her life, therefore causing a mental anger management disorder that causes the person to be psycho to the maximum level, otherwise known as VooDoo.
Christian is such a No Shirt. How does his glasses and his one and only t-shirt end up on a tree branch 100 ft in the air? He's also a No Shirt for letting his anger out on a poor, innocent little kid, by choking him for no reason. I guess his dolls really do control him.