"Screw you guys, I'm goin' home!" - Cartman
"Respect My Authoritah!" - Cartman
Eric Theodore Cartman, more commonly known simply as Cartman is the main antagonist of the cartoon series South Park and the arch-nemesis of Stan Marsh, Kyle Broflovski, and Kenny McCormick.
He has an intense rivalry with Stan, Kyle, and Kenny due to his constant scheming and disrepect for other cultures - the rivalry has intensified over the course of the series and the struggle between Kyle and Cartman can be seen in some ways as a struggle between good and evil in some later episodes. Also, no matter how much Kyle keeps telling Cartman the truth, the fatass refuses to believe the Jewish boy, and totally nothing ever gets through his fat head. Cartman is shown to be 100% delusional to which makes him believe that he is awesome and better than anyone, but he is too ignorant to see that he is sociopath. He has an ego the size of a universe making it totally impossible to convince him that he's pathetic in every way. He has a habit of saying the word "a$$#%@!(s)" more than any other South Park characters, he even called himself an asshole from the past. He's always been in denial about the fact that he is really fat. However, he was truthful about the fact that he loves being a racist (making funs of Jews and ripping on black people, and doesn't care if he's being rude) It is also shown that he worships Adolf Hitler as seen in the episode, Pinkeye, and how he believes that the German dictator was the most awesome guy around as mentioned in Make Love, Not Warcraft.
Cartman is often portrayed as very immature and quite cowardly, being reduced to tears once with a single passive hit from Kyle - however despite this he has also shown remarkable intelligence when he wants to, sometimes verging on the role of an evil genius and master manipulator as he has managed to gather large crowds to his will via impressive speeches and charisma.
Cartman's plans vary from story to story but are often small-scale and petty, such as cheating someone out of money or obtaining a new toy/gadget - though he has also had grander plans, some of which have verged on world-domination, though he always fails to achieve his goal (with one noteable exception).
Cartman is mostly portrayed as a spoiled brat who will do anything to get what he wants - denying Cartman of his goal is a dangerous game as he easily develops obsessions over such things and can be extremely vindictive when he feels wronged and if sufficiently annoyed he can develop an almost psychopathic glee in destroying his percieved enemies, despite this Cartman has no qualms about whining, begging and manipulating people as well and he has a foul temper that can explode at any moment.
The cause of Cartman's seemingly endless list of flaws seems to be a product of his environment, having been given everything from an early age he has come to expect such treatment and his lazy, selfish behaviour is often rewarded rather than punished by his mother - who also seems incapable of disciplining her demonic child regardless of the abuse she recieves.
Unlike the other central characters (Kyle, Stan and Kenny) Cartman doesn't seem to learn from his mistakes and thus continues to do incredibly stupid things that often backfire and blames everyone except himself for the results.
Another recurring theme in the series is that if Cartman is ever seen doing something good or selfless it is almost always a cover-up for some selfish plan - the effort put into these masterplans show that Cartman is not as stupid as he often acts but are usually doomed to failure due to either the actions of the other characters (especially Kyle) or some other factor.  [