Parasite

In DayZ - A person dressed in full military gear, has at least two fully kitted automatic rifles, doesn't speak to you, dances around infront of you like he has ants in his pants, asks you at least five times if you have any 55.6 to trade and tells you that he is a soldier. When asked, doesn't know what an MOS is and proceeds to ask you for ammunition before sprinting off into the horizon, never to be seen again until you restock your tents.

Wow, that guy's a fucking parasite. All he wanted was ammo for his five guns.