That feeling you get when you exhale from slamming some seriously fucking potent liquor. A slight burning sensation in which you feel like you could light on fire.

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.

When you have smoke still coming out of your mouth and you try to talk after hitting a huge blunt.