Best Friend With Benefits.
An arrangement in which two people
add a romance-free sexual component to an otherwise Platonic
relationship. The parties involved
may have once been a couple, but not necessarily.
Girl A: "I saw you at the restaurant with your man last
night. From that smile on your face, it looks to me like you had a good
time after
dinner!"
Girl B: "Oh, he's not my man per se...he's my BFWB."
Girl A: "So...you mind if I ask him out?"
Girl B: "Be my guest!"