A creature that surfaces at car meets, has a distinct smell of burnt clutch and head gasket failure to it, bounces between desperate lads in the car scene then tries to set up an only fans when her vagina would require 1tb of memory for a single lip shot

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.