When the person whom you've recently broken up with starts hooking up with, banging, or otherwise engaging in trifflin acts in a desperate attempt to regain their self esteem. Usually the "ex" will do this with partners that are significantly sub par when compared to yourself. -what happens to the things that you don't need anymore and have long outlived their use to you? They end up on craigslist for someone else to use.
Steve: "Hey man, I broke up with Stephanie a week ago and she's already bangin Mike".
Friend: "Damn man, he is a douche, I can't believe she's been craigslisted already!?"