Deeming one's own culture to be superior to that of others.
Not quite extreme to the point of fascism, cultirism often involves the more petty aspects of patriotism.
1: "Dude, soccer sucks. Where's the high scores?"
2: "No, American football sucks. You wear protection. Girl sport."
Jacques Chirac displayed his culturism by speaking of his dislike for English cuisine. He then displayed his French penis for the chef that tried to serve him fish and chips.