The younger brother of South Park character Kyle Broflovski and admires him very much. He is adopted from Canada with birth name Peter Gintz. Thus, he gets a flappy head and the upper half flies when he talks, just like other Canadians.
He is very clever and be the youngest person in South Park to have sex, with a teacher who he fell in love with.

When you eat dirt for the first time and leave your family to build a shack in the woods