When a giant douche kidnaps a joke in a real-time discussion, then posts it on Facebook for credit, all while simultaneously bragging about his ubber biceps and amazing salary
a potential Douche-napping example:
A old semi-douchey co-worker contacts you via IM. You decide to tell him a joke created by you and no other. He hijacks the joke and posts it on facebook as his own, while simultaneously talking to you about how cool he is!