Cartman is often referred to as Cartman's Mom, but the identity of Cartman's real mom is unknown. In South park: Episosde 202, "Cartman's Mom is Still a Dirty Slut", it is revealed that Liane
Cartman is actually
Eric Cartman's father, which
is possible because
she is a hermaphrodite, and that another
woman gave birth to him. To this day it has not been revealed who the actual mother of Cartman is.