An event or occurrence in which one person does or says something so brainless, so idiotic, so absolutely fucked-in-the-head that you begin to wonder whether you should point and laugh, or run away with overwhelming shame and embarrassment for the entire human race.

This always happens by one individual, without any outside influence. 100% natural stupidity.
"there were THIRTEEN cars off the road. THIRTEEN! i saw two separate three-car accidents, two 2-car accidents, and the rest were just individual acts of 'stupid'."

The worst offenders:
George W. Bush
Anna Nicole Smith
Amy Winehouse
Lindsay Lohan
Flava Flav
Paris Hilton
by a mother fucking genius January 3, 2013
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