Someone who is so far left-wing in ideology, that they make others believe that the person must be mentally handicapped - read: Retarded, to have such opinions.
person 1: Did you hear Amy talking about how 9-11 was an inside job? That Bush actually knew about it and that Cheney actually planned it.
person 2: Don't listen to her, she is a Leftard.
November 13, 2007