Jokes: They use "boys agression" (direct harm and physical attacks ) to manipulate others ( aggressively and directly )
Preppy Boys: Although they are boys,they use "girls agression" (nasty comments, trickery, deceit, excluding people from events, spreading rumors, stealing girlfriends, etc.) to manipulate others ( indirectly and Falsely ), like the Mean Girls ( movie ). They are not supposed to hurt, so they are differents of the jokes.
Gangs: They use the same way like jokes, usually with a criminal popularity.
The system is different depending on the school, and there are many fights with the differents mean boys cliques.