 Within the episode , The Canada Channel announces that , as an April Fools ' Day prank , it will be airing the new Queef Sisters show instead of the much @-@ anticipated part two episode of Terrance and Phillip . This is a reference to the South Park second season premiere . Instead of the expected follow @-@ up to " Cartman 's Mom Is a Dirty Slut " , in which the identity of Cartman 's father was to be revealed , Parker and Matt Stone showed the episode " Terrance and Phillip in Not Without My Anus " , a Terrance and Phillip @-@ centered episode as an April Fools ' Day prank . The move infuriated South Park fans . 
