Profane Chinese Chinese swear words, profanity, curses, and dirty talk, made simple.

Anybody out there know any good Chinese swear words that are specific to the Beijing area? That's where me and my people live and we're always looking for new Chinese curses to use - especially on Beijing folks, who tend to appreciate that sort of thing.

Anyone out there know a Beijinger with a filthy mouth that can help us populate these forums? :)