Matt Stone and Trey Parker created Terrance & Phillip as their answer to the people accusing South Park of being nothing but toilet humor.
'Terrance and Phillip' to us is us making fun of what the critics say South Park is.
You know, because when we read these articles that say South Park is wall-to-wall fart jokes, that's all it is, it's like, no, here's wall-to-wall fart jokes.

Trey Parker in The U.S. Comedy Arts Festival, March 1998