"Glenn Beck is a massive Douchecaster." "Diane Rehm is a massive Douchecaster." "I don't care if he's funny, I still think Stephen Colbert is a Douchecaster." "Karl Rove seems to have found a new career as Douchecaster."
Extreme indulgence in acting like a douche. Usually this action is effected in front of others, without concern on how one is perceived, whom these actions affect or consequences in general.
Guy #1: "You should have seen it, dude. I totally made that virgin fall for me, fucked her and then dumped her in the worst way, in front of the whole party. It was an epic!"
Guy #2: "Sounds like douchebachery of Charlie Sheen proportions."