Cartman is foul-mouthed (as are his friends).
Cartman does not possess the "underlying sweetness" of the show's other child characters.
Cartman is shown at times to be completely amoral and remorseless.
Cartman is amused by bodily functions and toilet humor, and his favorite television personalities are Terrance and Phillip.
Cartman is in denial about his obesity, because He is just Big Boned.
Cartman views himself as more mature than his fellow friends.
Cartman thrives on achieving ascendancy over others and exerts his will by demagogy and by demanding that others "Respect my authoritah!"