A Powerrmaster is undoubtedly the worst insult a person could give a different person. It's like calling them a noob, but with the
intensity and offensiveness of "fuck your whole family and the next 5
generations. Oh and fuck your country too."
Should you ever be called a Powerrmaster in game, the only option for you to do is to either quit, or pk everyone that saw that message
to the point where they all quit. Should you be called one irl, the only choice you have left is suicide.