Nap nasty Share definition Flag The feeling of grumpiness after waking up, especially after a too-long afternoon snooze. Him: Wake up, you need to feed the dog. Her: Leave me alone, asshole. Him: You have a nap nasty? Nap nasty by bow wow s September 22, 2010 0 0 Get merch Get the Nap nasty mug. Buy Now — $32.95 See more merch