Player is the default name given when Gang Garrison 2 is first launched. Although it can- and should- be changed through the Options menu, many people don't. As such, the name "Player" has become synonymous with players of little or no skill. However, at certain times, normal players and well-known Forum members will voluntarily change their name to Player to confuse people.
In the Gang Garrison 2 source code, the defauly player name is "P. Ness".