Someone who is both a douche and a chooch. I.e. From douche: 1. Someone who is more than a jerk, tends to think he's top notch, does stuff that is pretty brainless, thinks he is so much better than he really is, and is normally pretty good at ticking people off in an immature way. And from chooch: 1. Jackass, dummy, idiot, or moron. 2. A chooch is a person, who against better judgement, acts inappropriately. Could also be Chouche, but then it just sounds like chooch. So Dooch it is.
That dingleberry sure excels at being such a Grade-A high-end dooch.
Bill made cookies for the class but they tasted horrible! Bill really DOOCHED it!