noppelganger
like a doppelganger, but has the opposite personality. This person annoys you in all ways and ultimately ends up with one having to take out the other.
ie: evil twin
ie: evil twin
guy 1: Hey did you meet Bryan yesterday?
guy 2: Yea but he was my noppelganger so i shanked him.
guy 2: Yea but he was my noppelganger so i shanked him.