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1.
Someone who is so douchey, they destroy all signs of non-douche, and their being there radiates doucheness for hours, sometimes weeks.
Those people from Jersey Shore are such douchenukes.
by Foofy! April 18, 2011
 
2.
The only weapon capable of dealing with a Mega Douche, this is a put-down so powerful the offending douchebag realizes the full extent of his douchiness and is vaporized.
Did you hear the put-down Mike dropped on the Mega Douche Dickie? Total Douche Nuke! Dickie melted down completely.
by speedshift September 14, 2014