A sexual relationship with no strings attached. More than a one night stand as it may occur on a regular basis, but less than friends with benefits as there are no dinner dates or deep conversations involved.
The fucktationship allowed both Susan and SportModel the freedom to enjoy great sex with no intention of taking it further.
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.