When you are making coffee in a coffee maker and you lift the pot out carefully as you tilt your own cup into the stream of coffee. Taken from the opening scene of "Raiders of the Lost Ark" (1981) when Harrison Ford's character fills a bag with sand to steal a booby-trapped idol.
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."