After some severe anal penetration, if the girl's gaped,moist, ass is said to be so irresistable that one can't resist thrusting his/her tongue deep inside her juicy, tasty asshole,to retrieve all the anal juice waiting to be digested once again, then her ass is undoubtedly .... gapelicious.
Mark:John, what's up with your tongue?? It looks all swollen.
John: That bitch!!!! She tricked me!Last night whilst I was sucking all the juices out my girlfriend's gapelicious ass, her asshole tightened up on my tongue, leaving it bruised.
Mark:What can I say? As inviting as a gapelicious ass might seem it cannot be trusted.
(adj.) Used to describe something that is both gnarly an delicious at the same time. Something that's so special and brings so much bliss to life that it can only be encapsulated by this unusual word.
Nadia is so gnarlicious; I miss herimmensely (though I'm sure she doesn't feel the same).
Sushi is so gnarlicious I could eat it every waking second of my life.