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The act of being stupid and an idiot at the same time.
Kala is a stidiot.
Stidiot by Deweyman52 & Mase53 November 11, 2016
My Department Head is a Stidiot
Stidiot by Pigsloosh October 30, 2018
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.
shidiot by DeSiReDPaRaSiTe December 3, 2004
A stydiot is a person who ships Stiles and Lydia on Teen Wolf. The main characteristic of a stydiot is their massive ego and extreme bitchiness. The natural enemy of the delightful marrish shipper.
If you have to keep using the phrase Endgame , then you're a stydiot.
stydiot by Jen Barnes June 29, 2016
"a person that thinks they are smart, but is really just an idiot"
Look at that smidiot , he just let the love of his life drive away
Smidiot by hunteroffools October 8, 2009
a person who is both stupid, and an idiot at the same time.
jillian forgot to hand in an assignmet to her prof; therefore, she is a sidiot.
sidiot by Samanrha September 28, 2005