South Park

Season 1, Episode 13 — Cartman's Mom is a Dirty Slut

TMDB episode metadata

Show: South Park

Episode title: Cartman's Mom Is a Dirty Slut

Air date: February 25, 1998

Director: Trey Parker

Top billed cast: Trey Parker, Matt Stone, Isaac Hayes, Mary Kay Bergman, Mona Marshall, Jennifer Howell

Cartman needs to find out who his father is but his mom is no help. Learning that his father could be one of the many people that his mom had "relations" with during an annual party called "The Drunken Barn Dance", he finds that there's more to his mother than he thought.

Source: TMDB