Something you say to yourself as a reminder to keep your composure/remain a Thug Gangsta while in a situation that has you frightened or feeling scared. To help keep your cool till you get through it. Thugs dont Cry

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.