bounce back fat Share definition Flag Bounce back fat is the weight that you gain back after losing bunch of weight. Damn, after losing 50 pounds, I gained 10 pounds of bounce back fat, making it a total of 40 pounds lost. bounce back fat by johnnyboulders April 9, 2015 0 0 Get merch Get the bounce back fat mug. Buy Now — $32.95 See more merch