term is used when someone is so damn appealing that they are "fuckalious". similar to fuckable, but on such a higher extent, that its not even close. it can also be used as a catchphrase.
dude 1: dude...like daamn, that chick is so fuckalious...i would fucking bang the shit outta her ass through her cunt...
dude 2: dude...thats so nasty, but so fucking hawt, that u just gave me a boner, and i think i came a bit.
dude 3: Fuckalious!!
When something you have been anticipating for a while happens.
Wife: dinner is ready babe
Husband: fuckaly
When something finally happens, usually something you have been anticipating for a while.
Wife: babe dinner is ready.
Husband: fuckaly.