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.

Some random white kid trying to be funny or one of your niggas name starts with K

Kigga - Kyrgyz guy who reads / listens to hip - hop and lives with the urban movement.