In your example, I'd argue that hip hop is a more dominating segment of music than comics are of books. Maybe a book store called "Novel" that sold all kinds of books, which sounds less far fetched for some reason.

Dominating in youth, not well respected by older people, getting into the mainstream because people born in the 80s grew up with it... I don't know, comics sounded like a good counterpart.

"Novel" is the medium. It'd be more like calling a bookstore "Chick Lit" and selling all genres.

"In computer networking, a hop is one portion of the path between source and destination. Data packets pass through routers and gateways on the way. Each time packets are passed to the next device, a hop occurs."

Facebook uses hiphop as a name for a php platform, and that's fine. The problem here is that you are using it in a music context.