dinoflagellate Share definition Flag A really big fart. Big enough to shake the room like a dinosaur. Dino = big like a dinosaur, flagellate = flatulent. That was a dino-sized fart. Like, a dinoflagellate! dinoflagellate by blarghvierdes September 26, 2010 0 0 Get merch Get the dinoflagellate mug. Buy Now — $32.95 See more merch