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?"