When you really liked someone, but they turn out to be a complete ***hole, so you dump your respect for them by throwing it out of a window at them. Along with some complimentary rocks and an old shoe for bad luck.
"Oh girl, I am so crush dumping that b*tch-***hole-d*chebag. He lied about everything and he didn't even apologize. Lemme just run him over with a truck."