I know! I know!
High Culture is bluntly, rich culture. It is all about art, sophistication, and money. There is no room for error in high culture.
Low Culture is the complete opposite. Toilet humor, trailer trash, reality tv, and things that are immature in most peoples' eyes.
Pop Culture is what is popular at the moment. Usually this term is used in TV, Music, and some clothing fads.
Yay Social Psychology!!!!