Top Definition
a royal fuck-up. one whom could not possibly fuck up a situation any more.
George W. Bush is one of the biggest dunderfucks to end up running a country.
door Volak 28 april 2004
1 more definition
When "stupid motherfucker" just isn't enough. A person of unlimited stupidity.
Linkin Park is not metal, you fucking asshole. God, you're such a dunderfuck.
door Ken 19 april 2003

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