Wrongolian
A person who is very wrong about something in particular.
Man: "Game X is the best game ever"
Man2: "Don't be such a Wrongolian"
Man: "I'm telling you it's true!"
Man2: "Sounds like you just got back from a trip to the Wrongolian diner."
Man2: "Don't be such a Wrongolian"
Man: "I'm telling you it's true!"
Man2: "Sounds like you just got back from a trip to the Wrongolian diner."