This is the day we appreciate the life of 17 yr old Russell Simper and 15 yr old Rylee simper. We all pat them on their back and give them a kiss on the lips farewell.

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.