WiryerrorRB
A guy who tries to be muscular (Wiry) but fails miserably (Error) and when someone asks how muscular he is he reply back that it’s good (RB)

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.