From PathfinderWiki

A Shoanti term meaning "outsider", tshamek insinuates the worst meaning of the word. It is thought that all of these outsiders bring with them the actions of the Chelaxians that pushed the Shoanti from their ancestral lands of southern Varisia. Although it is not common, and generally looked down upon, there is a precedence of a tshamek completing a challenge such as a burn run to become part of the tribe.1