Somebody who only knows the negative side of a story or a life situation.
They dont beleive in acknowledgeing good things in any respect.
"Hi max, my life sucks" - Negatorist Mike
"Mike, dude your life rules you have money, a girlfriend and alchohol!" - Max
"Yeah but, i hate life, i hate everything, nothings ever good to me..." - Negatorist Mike
"Your such a negatorist dude... get a grip!" - Max