Much more subtle than
fuck you or go to
hell, but with all the impact. It is the abbreviated imperative for, "You should get bent over, so someone can sodomize you on
Christmas!" Used in reply to outrageous requests...
Spouse: "Honey, could you and your
friends please quiet down? I'm trying to speak with mother about the baby shower."
Other Spouse: "Hey bee-atch, get bent! Can't you
see that me and my homies are watching the game? And tell that old hag to suck my
dick while you're at it?"