A private school in São Paulo, Brazil, whose real name is Vera Cruz, but its lovely students kindly adopted Erva as a reference to marijuana, which they happen to develop a taste for after 8th grade.

The school is expensive and left-oriented, although all types of -rich- kids go there.

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.