Eric Theodore Cartman, commonly referred to as just Cartman, is a fictional character in the adult animated sitcom South Park, created by Trey Parker and Matt Stone. He is voiced by Parker, and is one of the series' four main characters, alongside Stan Marsh, Kyle Broflovski, and Kenny McCormick. He first appeared with the name Kenny in the short film The Spirit of Christmas (1992), and later appeared in the 1995 film of the same title before debuting in "Cartman Gets an Anal Probe", the first episode of the series, on August 13, 1997.
Cartman is an elementary school student who lives with his single mother, Liane, in the eponymous Colorado town. Cartman is principally characterized by his obesity, his amorality, and his bigoted and especially antisemitic disposition, being described by Parker and Stone as "a little Archie Bunker". In later seasons, particularly following the fifth season episode "Scott Tenorman Must Die" (in which he turns the titular Scott Tenorman's parents into chili, in order to feed it to him as revenge for bullying him), Cartman exhibits increasingly psychopathic and manipulative behavior. The latter is showcased through Cartman's various schemes, the majority of which fail either due to opposition from other characters or Cartman's own hubris, frequently leaving Cartman in complete humiliation.
Cartman is widely considered to be the most popular South Park character, one of the most influential fictional characters of all time, and an American cultural icon. Parker and Stone have stated that he is their favorite character, and the one with whom they most identify. South Park has received both praise and criticism for Cartman's politically incorrect behavior.
Source : Wikipedia