Top definition
A person with no intelligence

Idiot,Plonker,Pillock,Klutz
Dunce,Numskull, Blockhead, Bonehead, Lunkhead, Hammerhead, Knucklehead,Muttonhead, Shithead,Fuckhead
''what you doing!'' ahh you dunderhead!''
by sweet jesus July 10, 2006
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2
1) A drunkard, someone intoxicated, currently also construed as a numb skull or someone who is thick headed in nature.
1- Don't be such a dunder head
by cunninglinguist May 05, 2005
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3
A person that says something that makes everyone in the room go "wtf???"
Dude 1: I think Justin is better than Britney because he is cuter!!!!!!!!
Entire room: *slowly backs away*
Dude 2: Who invited the dunderhead?
by Dunce! ! ! January 15, 2011
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4
That WholeLotta Luv guy is a complete dunderhead for dumping that cute fairy girl!
by Kilmeny Mistwallow January 02, 2012
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5
A fan of the show "The Office" on NBC. The word stems from the fictitious paper supply company "Dunder Mifflin" featured in the show.
You can be sure a dunderhead will be plopped down in front of a T.V. at 9/8c every Thursday night.
by Jake Wetherall October 30, 2007
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6
A fan of the show "The Office" on NBC. The word stems from the fictitious paper supply company "Dunder Mifflin" featured in the show.
You can be sure a dunderhead will be plopped down in front of a T.V. at 9/8c every Thursday night.

This particular definition, although credit shown to someone else, was started years ago by Bobblehead Gary, (Gary Dunn) the greatest Office fan ever.
Dunderheads love The Office and will do everything in their power to support it.
by Rickie B. July 29, 2010
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7
A person with a smelly and or dirty penis.
Wow that hot guy last night had such a Dunderhead.
by Dont mess with the Turk July 02, 2010
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