?/>.<,mnbvcxz"':;lkjhgfdsa|\}{poiuytrewq+=_-0987654321)(*&^%$#@! meaning that you are EXTREMELY bored to death. This word also may appear on a youtube video because a content creator wants to kill theirselves

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.