|First Appearance||Mr. Hankey, the Christmas Poo|
One of the show's oldest and fondest background characters, along with Brimmy, Slanty wears a gray and green jacket and has tall light brown hair. He sang in the Christmas choir, joined the kids when the bus was stranded (in Stan Marsh's dream, at least), sang along with Mr. Mackey about poo, and graduated the third grade. He has a slight southern accent.
- "This poo is cold." (South Park: Bigger, Longer & Uncut)
- Mr. Hankey, the Christmas Poo (s01e10)
- City on the Edge of Forever (Flashbacks) (s02e07)
- South Park: Bigger, Longer & Uncut
- Fourth Grade (s04e12)