Mollymauk is a person who’ll always fight for what he believes in. He is the helper, he leaves every town he goes to better than he how he found it. He’s never afraid to embarrass himself and will always support your dumb plans. He reigns over the stars and the moon. Mollymauk is the beauty he wants to see in the world, as well as the chaos.

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.