Originally coined by S. Henderson Morris in 1991, "shyuh" is simply a contraction of "shoot" and "yuh," the latter of which is a shortened version of "yeah". A more vulgar meaning of "shyuh" can be witnessed in less developed areas of the country such as regions around Cincinnati, OH and the entire state of Tennessee.
TJF: "Do you like to watch Tennessee loose?"
MJS: "Me too. They suck."