Stuart has long, messy light brown hair and a brown mustache.
During the commentary on this episode, creators Trey Parker and Matt Stone deny it was Stuart McCormick and claim it was another non-related McCormick due to his not wearing the signature red "Scotch" cap and having dark brown hair and a goatee mustache. It was presumed this was Kenny's father's first appearance in the Season One episode, " Death". In " Lil' Crime Stoppers", it was stated by the Bar owners that the McCormick's make Meth for them. However, in " The Poor Kid" it is proved that the McCormicks run a Meth lab. He is currently jobless, due in major part to his alcoholism, and he and his family are on welfare, and live mainly off of plain frozen waffles, pop tarts, and bread sandwiches because of this. In " Chickenpox", it is also mentioned that Stuart used to work in a pizza factory when he was a teenager. In " The City Part of Town", the house was upgraded on the exterior, and he does seem to care about his house, as he got pissed off at Randy and told him "I don't want you touching my damn house!" In " A Ladder to Heaven", they somehow managed to afford a Robot Security Guard to protect Kenny's cremated body. In " Cartman Joins NAMBLA", the North Park Funland commercial is shown in color, implying that somewhere between the episodes " Chickenpox" and " Cartman Joins NAMBLA", the McCormicks procured a color television. The McCormicks do not own much modern technology, as the family video game system is a ColecoVision, which is plugged into a monochrome television. Their car is dismantled in front of the home and is home to stray cats and dogs. In " Chickenpox", it is revealed the house was made by Stuart and Gerald Broflovski when they were young. Stuart and his family live in a run-down old bungalow. It is also revealed that Kenny, disguised as Mysterion, has been scaring Stuart and Carol not to get high at night, fight as much, and to pay their children allowances. He and his wife claim to have been extremely drunk while there - something their son does not question. In the episode " Mysterion Rises" it is revealed that Stuart and his wife had been part of a cult centered around Cthulhu ten years before the series' events and that he had been with Carol at the time. He also tried to stop Kenny when he tried to plunge the baby out of his wife and at the end is the one to suggest they name the baby Kenny. When Kenny, trying to kill the unborn baby, offered his mother a drink, which he had blended a whole bottle of abortion pills into, and she explained that she couldn't take alcohol while pregnant, Stuart offered to drink it for her.
In " Cartman Joins NAMBLA", the two of them decided to have another child. When he is sober, he is very loving and caring to his wife. Although he and his wife have been shown physically abusing each other, it has never been shown or implied that Stuart abuses his children. He is shown to often argue and abuse his wife, but it appears to go both ways, as in some episodes Carol berates him without direct provocation.
Being a heavy alcoholic, Stuart is drunk most of the time.