Douchebag (Dooshush Bag) n. 1. a person who through action or inaction selfishly imposes on others, commonly invloving a cell phone or a loud conversation. 2. a person who causes unneccessary traffic behind them by either driving slowly in the fast lane, or by racing froward and cutting in. 3. An individual who doesn't realize the obvious outcome to a decision they have made. Example: "Jerry is such a douchebag for not realizing his stripper girlfriend would cheat on him." 4. Used by Arren Leaves to define an incompetent coworker.