 Parker says to achieve the effect of Cartman's voice, he simply uses the same technique when voicing Stan while "adding a lot of fat to it".Cartman is partially named after and based on Matt Karpman, a high school classmate of Parker who remains a friend of both Parker and Stone.Cartman is also inspired by "All in the Family" patriarch Archie Bunker, who is himself inspired by Alf Garnett from "Till Death Us Do Part", the original British version of "All in the Family".