"Shitty Shitty Fag Fag" was featured in the Season Five episode, "It Hits the Fan" The song is a parody of "Chitty Chitty Bang Bang", from the movie of the same name.
Mr. Garrison is free to use the "shit" because the word was heard uncensored on HBC Network's Cop Drama program. He sings this song as he walks cheerfully down the sidewalk.
Shitty Shitty Fag Fag
Shitty Shitty Fag Fag,
How do ya do?