beautifuk is a state of a relationship where you can't get enough of one another in all and every form... mental, physical, emotional, spiritual, sexual and conversational.
not only is the sex great but you understand each other and make each other laugh. you communicate well with one another, in and out of the bedroom! so whether you are screwing like teenage nymphs on the stairs or baring your vulnerable souls over toast, you are in a state of - beautifuk.
also a beautiful girl/boy that you just want to f*ck all the time and you are also in love with, a very rare occasion indeed.
Vap: Dood. Wtf you're gay.
Gabe: That flower is beautifuk.
A combination a "beautiful" and "fuck".
Bob: "Yeah, I know right. I beautifuk her gently."