The Sho is short for the nickname "The Shutout". This name is reserved for the guy that just dominates the game. He is what you call the x-factor. This person is know to be the best of the best, cream of the crop, or the greatest. The most common usage is for a baseball pitcher who just straight sits punks down. He is cool, calm, and confident at all times. His hair is always sexy and I hear that the bitches just throw their panties at him.
Damn man look at that pitcher, number 34 bro, that dude is "The SHO", nobody can touch him, the game needs that guy.