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2.
The practices used by someone who is a douche rocket.
Where's Tom?

He off somewhere, engaging in douche rocketry, no doubt.
by Dusty Buttons February 01, 2007
 
1.
The science and practice of being a douche at a whole other level.
Prior to becoming a governor, Scott Walker earned his PhD in doucherocketry.
by The Anarchist in the Library March 10, 2011