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1.
When something is retarded, but you don't want to use the word retarded because it isn't nice.
They just moved the one outlet in my bathroom to a completely unusable location. Could there have been a more stupided place to have put it?
by no clever name June 24, 2010
 
2.
Done something stupid.
Friend: Hey you answer that easy question wrong!!
Me: Oops... I have stupided.
by Alan Shiu September 01, 2007