Leopol Stotch (voiced by Matt Stone), commonly known as "Butters", is a popular fictional character in the animated television series South Park; his nickname is a play on the word butterscotch. Butters has a large tuft of blond hair on top of his head, and wears an aquamarine jacket with dark green trousers. His birthday is on September 11, as revealed in the episode "AWESOM-O." Having a birthday that's the same day as a national tragedy is just one of Butters' many misfortunes. Matt Stone speaks the lines of the character Butters in a distinctive, wholesome manner. The character is loosely based on South Park director of animation Eric Stough, whom Stone and Trey Parker regarded as a "goody-goody" because of his reluctance to offend.