A person (typically male) or their actions, who has acted in such an obnoxious manner that the behavior alone reeks as an unsanitary twat would. Malicious intent and/or malevolence is a general added characteristic.
The most vile form of
Douche-Baggery. In progression of severity of behavior: One could be a Douche, a Douche-Bag,
Douche-Nozzle, or most
disgustingly Douche-Nozzle Backflow!