flabceps Share definition Flag triceps and/or biceps consisting of more flab than muscle, to extreme point of flapping around whilst waving at acquaintances. "OMG did you see Tammy's flabceps? I could see them flailing from across the street." flabceps by Flabceps July 1, 2014 0 0 Get merch Get the flabceps mug. Buy Now — $32.95 See more merch
