What does it mean to be a fusion guitarist?
It is a term thrown around pretty casually. By definition, fusion means the blending, or fusing, of more than one styles. Technically, if you're guitar playing is a combination of country and rock techniques and styles, then you are a country/rock fusion guitarist.
Is fusion hard to play?
Fusion, on the other hand, is very difficult. Instead of shooting a neutron at an atom to start the process, you have to get two positively charged nuclei close enough together to get them to fuse. Without the electrons, atoms have a positive charge and repel.