What is the southpark episode with the song kyles mom is a big fat bi?

The South Park episode featuring the song "Kyle's Mom is a Big Fat Bitch" is titled "Mr. Hankey, the Christmas Poo." It is the ninth episode of the first season, which originally aired on December 17, 1997. In this episode, Eric Cartman uses the song to insult Kyle's mother, which becomes a recurring theme in the series. The song is notable for its catchy tune and humorous lyrics, highlighting the show's irreverent style.