Used in place of bad words and when you get super excited. Instead of “Damn, Gina”, it’s “Dan and Shay!” Or “Yo bro look what I just picked up!” “Dan and Shay that’s nice!”

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.