Devil's Folly Share definition Flag Doing something or agreeing to something that would inhibit one from doing what is necessary or beneficial. It was a devil's folly to do yard work for someone when I should've been practicing self-care. Devil's Folly by Phylo97 October 31, 2020 0 0 Get merch Get the Devil's Folly mug. Buy Now — $32.95 See more merch