Culture Vulture

In the same way it was used in the episode, it's a self-handicapping/defeatist ideal.The phrase's meaning is basically: "You can't fail if you never try"; the idea that possible failure is not worth the possible reward and as such the person doesn't try.The creepiness comes from the fact that this is a very common idea and feeling that many people feel; be it in moments of weakness or over long periods of depression and whatnot.Also you have to consider the surprise factor of such a phrase popping up in MLP of all things.