Flabula Share definition Flag A flab of skin that is naturally in the place of the penis of a homosexual, bisexual, or transsexual male. That guy is so gay, he has a flabula instead of a penis. Flabula by buckeyetiba February 29, 2012 0 0 Get merch Get the Flabula mug. Buy Now — $32.95 See more merch