"It's phony, goddamn it but mysto and after a while it starts to infect you, like an itch, the roseola." p.19 of The Electric Kool-Aid Acid Test, by Tom Wolfe.
It was mysto why there wasn't a definition on Urban Dictionary for "mysto," so I made one, immediately after some dumbass on Slate said there wasn't one, rather than just making one himself.