Rocko Wallaby and the Glaisses of Filburt

Filburt goes on a brief errand trip to the supermarket followed by a trip from there to the eye doctor's. At the eye doctor's, Filburt overloads himself with stereotypical Jewish mannerisms and becomes the living embodiment of a flawlessly stereotypical Jewish dork. Rocko, our unlikely Aussie hero, is the only one who can stop him. This is one of the funniest fanfics of all time.