swallowtail Share definition Flag A lesbian who seeks her own pleasure by gratifying a lover who mutually enjoys oral anal sex. A lesbian who likes to lick her girlfriend/lover 'from asshole to appetite.' i.e... a swallowtail... swallowtail by sneakylikeu January 4, 2013 0 0 Get merch Get the swallowtail mug. Buy Now — $32.95 See more merch