Arm day is the only day because you will never meet your Skype girlfriend in real life. Goes to car meets with fake Yeezys and 2009 Justin Bieber hair cut. Watches porn too much. Big upper body, small lower body; especially the penis.

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.