Right, that's demifiction.

The YouTube link is to a "video" which explains a slang term in Ysabetwordsmith's Polychrome Heroics universe.

So, if you've got a fictitious world where chefs compete for a slot on a world-famous cruise ship, I could easily write a blurb detailing some occurrence which would make the local paper (at least). Or I could write a review bashing the last winner's cookbook as "trite, overused Paleo servitude hidden in demitasse serving cups and gimmicky presentation".

Meant to be fun, and to flesh out the world.