Doucheflags
As discussed here, there are certain things — well-known things — if perhaps not widely-acknowledged things, that immediately trigger disgust or disdain in whomever overhears. Things like “I don’t even own a TV” in response to a conversation about a TV show or “I’m not a worker-bee, I just live, man” in response to people complaining about their jobs (generally this person is unemployed and into extreme sports); statements that are at once dismissive and pretentious.
The TV one is one I’ve actually seen mentioned more than a few times in other places as something deserving mockery, but what are some others? There’s gotta be enough to form some kind of doucheflag index.