The act of knocking someone down, or waiting for one to fall asleep, and dipping a used douche repeatedly in their face. Closely related to Teabagging.
"Marc, man, you seriously have to stop douchebagging people. That's messed up, man."
Having the qualities of a douchebag; often seen in those with an abundance of first names, the socially awkward types, and/or the class know-it-all which everyone despises.
"Zachary Micheal Paul showed extreme douchebagginess when he blurted out the answer in class and then scanned the room to make sure everyone heard him."