Dumpback Whale Share definition Flag The act of exsposing ones naked rear end while swimming, as a whale would flip it's tail in the air before diving. We spotted a dude pulling off a dumpback whale at the pool today. Dumpback Whale by Hedwund April 9, 2010 0 0 Get merch Get the Dumpback Whale mug. Buy Now — $32.95 See more merch
