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.

A term used to describe one's inner circle of friends, also known as niggas.

Your dawg, homeboy, homegirl. Someone who your mad cool with.

noun phrase

A very good friend; best friend (Black to black and male to male)