Self Qualified Referee

Someone at any sporting event who always has to call the fouls, say the ref is wrong, or something similar even though nobody really listens to them and they don't have any idea what they are talking about. They think the ref is wrong about everything even though he gets paid to do it.

Soccer Mom-Oh, come on, that was such a foul!
Annoyed Observer-SHUT UP YOU SELF QUALIFIED REFEREE!!!