flabis Share definition Flag flibis: the excess fat that is chopped of from weight loss surgery. It also is a very bad cuss word. 1. after the doctor cut off the fat, it was considered flabis. 2. you flabis head flabis by mike b February 20, 2005 0 0 Get merch Get the flabis mug. Buy Now — $32.95 See more merch