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Unintentional crease/fold in a notebook, paper or book currently in use. Can be used as noun/verb or reflexive verb/adjective.
1. I have a doucheflap in my notebook. RAH!
2. Shit. I just doucheflapped my book.
3. This notebook is doucheflapping on me!
4. This book is so doucheflappy!
by Ira Banks and Laila Matar January 17, 2009
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(Not to be confused with actual douche/hygiene-maintenance equipment)

Someone who goes way beyond the normal, standard definition of an asshole. Usually used as a term to describe/direct one's anger (and in some cases, absolute rage) at someone who is pissing them off to a very high degree.

Synonyms: see ass clown, Assclown McDouche
"Sweet fucking Jesus tits! Look at this douche flap cutting me off!" Nice driving asshole!"

"Even though I have higher qualifications, Henry gave the promotion to that fucking douche flap Dave who isn't even here half the time!"
by Brownie O May 10, 2012
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