All of those people who post long, self-riotous actual definitions of derogatory, intimate, or touchy terms.
They destroy the humor by admonishing slang term and disses which are awesome with things we all know already, or will look up in the actual dictionary of needed.
The term is from Urban (or street/slang) (Bus) the vehicle which holds the kids who use most of the terms, and Killer, the teacher on the bus who scolds the kids for the jokes.
Urban (Bus) Killer: "Fag is a derogatory term used typically by middle schoolers for homosexuals. Homosexuals are not funny or to be talked down about, they are humans like like you and me..." and on for another page.
Me: "Scat eating bitch! *scroll and read next one, "Fag is another term for man who thinks shit is candy and keeps trying to suck on your ass to get some." "Ha, that's a new one."