A mixture of shithead and idiot. Often known for as being an insult, definately not a compliment, and NOT defined by the following person above/below/whatever, it was a common swear word my grandfather would say when driving on the road and running across a 'shidiot' who obviously didn't know what they were doing.
That stupid shidiot doesn't know how to drive! The light isn't going to get any greener, damnit!

I can't stand that asshole, he's a stupid shidiot.
by DeSiReDPaRaSiTe December 4, 2004
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1 someone who is a shit head and an idiot
by Diamon March 2, 2005
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A total shit headed idoit that just sits there and mumbles to him self while refusing to get head from a hot chick.
He is such a shidiot look at him.

Wow look at that shidiot.
by Chick Master Flav August 21, 2011
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Shit/Idiot combined, The word was originated when I was watching Freddy Got Fingered (horrible movie)and somebody yelled "idiot", it sounded like "shidiot", but just so that everybody knows I made it up, me!
You're a shidiot.

People who think that they made up this words (and aren't me) are shidiots.
by Joseph Squirrels April 4, 2003
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A person that is part shit head and part idiot
That person is a Shidiot
by mshadoe December 12, 2013
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You're a shidiot. Absolute shit and also an idiot. You shidiot.
by Tall Fella January 9, 2022
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