Sour / Wild Ales
We talk about Wild Ales or Mixed Ferment beers to basically differentiate sour ales - ones that have spent months and years in the souring process, and ones that have not. We're talking about the former here. Beers made with bugs. No not flies, microscopic bugs. Bugs like pediococcus and brettanomyces which take time to work their magic. If you want to go down a beery rabbit hole then this is the right area of study for you.