bootchyfliff Share definition Flag Bootchyfliff (Boo-chay-fliff) is the fluff found inside the belly button, a single word to describe belly button fluff. that dude over there is eating his bootchyfliff, GROSS! bootchyfliff by Ty Gates December 28, 2007 0 0 Get merch Get the bootchyfliff mug. Buy Now — $32.95 See more merch