GAB BLU Share definition Flag 1: A strange disease resulting in a lack of people who like you and saggy body parts. Another affect of the disease is you may find yourself rejedcted from hotel rooms. Wow! That saggy, lonely girl has the GAB BLU epidemic. GAB BLU by Micheal December 30, 2004 0 0 Get merch Get the GAB BLU mug. Buy Now — $32.95 See more merch