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A person who is known for being wrong about everything that is worth having an opinion about.

If you have a plan you want to follow you should ask their opinion about the plan. If they hate it, then you should probably go ahead and implement the plan. If they love it, then you need to go back to the drawing board as your plan will have deficiencies that you haven't been able to see, but the Known Idiot will have detected and loved.
Programmer 1: John is our known idiot, can you ask him what he thinks of your software design before implementing it?
Programmer 2: I asked him already - he thought it was a great idea....so I'll throw that design away and start again, it's obviously full of bugs.
by Danack August 12, 2013
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May 17 Word of the Day
Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.
I felt deep sonder thinking about the all the people who looked up this word along with me.
by rednos January 10, 2013
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2
A person who carries out idiotic action even when they should know better.

For example, Donald Trump wiping his lips then shaking hands during a corona virus press conference.
Donald Trump is a known idiot when it comes to the corona virus.
by Danack March 14, 2020
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