Friends With Benefits And Requests/Requisitions, which indicates not only a friend with those 'special' and 'extra' benefits available, but a friend who requests the activities most of the time in every FWB relationship. He/she would be fwbar.
Pete: Hey, you wanna come over for a little while? =]
Pete: I need my pipe cleaned. XDDD
Tanya: I donno about today.
Pete: Oh, come on. Just a hand job, maybe, then??
Pete: Maybe just send me some pics of you doing some poses.
Pete: ..... make-out sesh??
Tanya: Gawd, you're so fwbar.