A girl is jonesing for a bonesing when she has been deprived of sex, is desperate for male attention, and/or is simply a slut looking to get boned on any given night by any given dude. Girls that are JFAB are easily taken down by almost any guy after a few drinks and not saying anything too wild that would mess up your outstanding, essentially assumed chances.
Broski: "Dude did you take that chick to pound town last night after the bar?"
Standard Dude: "You know it. Basically talked to her for a minute or two before last call and she said we should go back to her place after I passed the "test" of remembering her name."
Broski: "Haha legit. She was clearly jonesing for a bonesing."
D.E.B.S - Are you kidding me? We conduct a nationwide manhunt for you and you're boneing the suspect? Did you think this was a joke? "Let's divert federal resources and man hours so I can have my collegiate lesbian fling in style."