Billy Bob Thornton is an American actor, singer, songwriter, and musician who has appeared a few times on the show.
Billy Bob Thornton first appears in the Season Fourteen episode "Sexual Healing" as one of the men addicted to having sexual intercourse with many different women as well as a member of the Karne Institute for Sex Addiction. He is then "cured" of his sex addiction by the end of the episode after Kyle and Butters kill the Wizard Alien.
Billy Bob Thornton has gray hair that is combed in the front, gray eyebrows, and a small gray goatee. He wears a gray vest with a black undershirt, blue jeans, and black shoes. He also has a pair of military dog tags around his neck.
- In the Season Five episode "Towelie", Cartman imitates Billy Bob Thornton's character Karl Childers from Sling Blade when he finds Sharon Marsh's tampon in the trash can.