LOL! I didn't come up with "Bob", and I can't remember who did (perhaps cofax7?)

But "Bob" has started coming up in the vernacular for those fics that do reference or hint at romantic relationships between characters, but it's not the overall focus of the fic. It's this crazy limbo where things can't be categorized in these "labels" fanfic convention has insisted be made of gen/slash/ship, and thus...why not make up a new one and name it "Bob".