Carebear
From WoWWiki
Carebear is a pejorative term used against those that prefer Player vs Environment servers. Carebears prefer completing in-game tasks without outside interference or interaction (violent or otherwise) with opposing factions. This is in contrast to "PKs" who will often attempt to "Gank", or "PK", players of the opposing faction on servers that allow PvP combat while performing in-game tasks, or just the thrill of random open world combat.
