A person, male or female that so craves the feel and taste of sperm, they will have sex with two men at the same time, one anal or vaginal, the other oral, seeking the maximum amount of sperm from the transaction. Cum pigs love the feeling of degradation they get from being screwed by two men at the same time, often hoping to have the cum sprayed on their bodies, esp. the face.
She took it from both guys last night, at the same time. When the popped on on her face, they realized what a horny cum pig she was.