fel-anal-ingus n. 1. The ultimate sex act. 2. A combination of fellatio, anal intercourse and cunnilingus designed to give the greatest possible pleasure to all participants. The individual acts have been performed for centuries in all countries of the world, but only recently has it been discovered that the melding of these arts has been engaged in by mysterious societies not daring to divulge their sensuous secrets to a world not yet ready for them. 3. Felanalingus can be the most effective sexual activity capable of inducing fully-satisfying orgasmic reactions in both males and females!