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2.
Unparalleled douche. If there is a limit to how douchey you can be, a dounderhead's existence is dedicated to exceeding that limit.
Did you see that dounderhead Andrew walk by? The only other word I would use to describe him is 'douche.' Dounderhead also means 'douche,' but it's like, a whole lot worse.
by pIaNoLeGz March 09, 2011
 
1.
1) similar to douche, but worse

2) Andrew
Andrew, stop being such a dounderhead. It is almost like you are being a douche but oh so much worse, bitch.
by Valhalla123 February 21, 2011