"The Yada Yada": Season 8, Episode 19
This gem comes from the same episode that gave us "Yada yada yada." After Jerry accuses dentist Tim Whatley (played by Bryan Cranston) of converting to Judaism just for the jokes, Jerry goes around town telling dentist jokes and complaining about a dental procedure. This earns him the title of "anti-dentite," a riff on the anti-Semitic jokes Whatley now has free access to. Honestly, doesn't everyone has a little anti-dentite in them?