South Park Episode 13 Cartman’s Mom is a Dirty Slut (1) Episode Title:Cartman’s Mom is a Dirty Slut (1).Episode Description: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 then he thought.