An utterance of encouragement to treat a
person/thing as being one's permanent possession/property,
free to be mistreated/misused, especially when both the encourager and encouragee know such not to be the
case. Commonly done when loss/destruction of a partner/object is imminent, or when one does not take the partner's next partner/item's next owner into consideration.
Kris: I don't think it's going to
work between Jamil and me. Our
relationship seems so tenuous.
Paul: When you know it's all but over, bone it like you own it!
Andreas: I've been using Paul's
car while he's on a 5-week hike, but I'm afraid that it's about to die of its own accord.
Booby: If it's on its way out anyway, bone it like you own it.