From Overheard in New York:
Thug teen: I wanna take out this fuckin' book.
Librarian: Okay, well, go to the check-out desk.
Thug teen: I got to go to the other fuckin' desk, mothafuckah?
Librarian: Yeah, motherfucker. The other fuckin' desk.
Gee, sounds like some of my Public Library experiences. And Undergrad, on some evenings.