nuclear nadaddy Share definition Flag When you wear a headband and all your hair poofs to the top, like a nuclear explosion. Inspired by nadaddy from FF5! Wow. That nuclear nadaddy looks really nice. It makes you look like a muffin. nuclear nadaddy by Givemepant May 2, 2010 0 0 Get merch Get the nuclear nadaddy mug. Buy Now — $32.95 See more merch