Top definition
Noun.

1. Pure, unadulterated stupidity. Daftness of a magnitude that shocks beyond words. Total and complete lack of reason. Utter futile uselessness. Such wanton disregard for logic as to render silent all within earshot of the event.

From the English "bum" (see ass) and "fuck"
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1. I won't stand for this bumfuckery, by Jove. I'm going home.
by thaks May 20, 2006
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2
someones ineptitude or general incompetence when working on a simple task
because of your bumfuckery, I have to work 8 hours OT and clean up your fuck ups
by maninblackmn February 08, 2010
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