Used to describe something or someone that is both insane and idiotic. Created April 2007 in Decatur, IL at the Decatur Herald & Review Newspaper.
It's hard to tell just how insidiotic Rick James was, but "Super Freak" will always be pure genius.
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The slow painful way someone who is following a completely derailed train of logic will support or arrive at the most absurdly stupid conclusions.
Watching her Barbie-doll Brain work it's insidiotic pattern was like rubbernecking at an auto accident.
The insidiotic monologue he delivered made me seek out the sound of fingernails on a chalkboard.
Listening to her insidiotic explanation of how the colors on traffic lights were actually reversed, I realized that some people didn't have to really understand anything as long as they followed the rules.
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A person who at first appears to be normal but who gradually, over time, reveals himself or herself to be nothing more than an idiot. Derived from a merging of the words "insidious" and "idiot".
"The guy sitting beside me on the plane seemed like a cool guy, but the more he kept talking, I came to realize that he was nothing more than an insidiot"
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A person who knowingly acts in a devious and treacherous way to sabotage another person's well-being while simultaneously putting their own well being at risk.
The insidiot did everything in her power to ruin her ex-husband's business with no regard for the ill-effects it would have on her financial health.