Flaboon Share definition Flag A Person whose I.Q. is less than that of a baboon but whose weight, per ratio is rather heavier. Has a high opinion of oneself "get out you flaboon" or "your nothing than a complete Flaboon" Flaboon by Special Knees February 14, 2012 0 0 Get merch Get the Flaboon mug. Buy Now — $32.95 See more merch