a 13 yr old boy who is very wholesome who plays a very toxic game. He is very nice, too nice... very sensitive and gets mad easily, he has a big skill in minecraft and 24 pot Skidz

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.