The action one takes when someone sees a mundane, yet evil none the less, attempt to break the law. These attempts can come in the form of littering, loitering and standing in a bed of flowers. The actions must include something magic related, such as spontaneously setting up a maze of mirrors to lead a littering perpetrator to be trapped in a trash can with the piece of litter in his left breast pocket which now has the name of his long deceased, childhood pet written on it.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.