Someone who breaks up stupid facebook fights. Usually someone who is tired of people using facebook to argue and would just like to see the two combatants fall in deep holes. Usually a person who doesn't know the the people arguing that well, and so will not face backlash from either of them later on for breaking up the facebook fight.
Facebook User 1: y0ure dummm!
Facebook User 2: n0 yore dummm!
Facebook referee: Will you both shut up and do something productive with your lives?