When a male trys to alpha another male in front of an audience. For example: by lifting something up when it wasn’t nessessary, to make you look incapable of doing it.

The equivalent of “flexing your nuts”

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.