stupidacity 

A boneheaded action committed by one who should know better but goes ahead and does it anyway.

Stupidacity is as stupidacity does! May that dude rest in peace for running a stop sign in front of that semi truck that pushed him broadside into the train running alongside him.

stupidacity by jimmiedavurdmeister January 2, 2009

Stupidiate 

Taking a language with over half a million words and making up new words for it because of ignorance. This can also describe when a word is misspelled so often the spelling changes in the dictionary.

Words like refudiate, frenemy, and stupidiate are perfect examples. Also in the case of spelling changes, words like judgement which is now also spelled judgment fit this definition.

Stupidiate by Tzar of Anachronism September 8, 2012

Stupidnesslevel 

Level of stupidity. A word created by PassionGirl on asianfanfics.com, the word was used for the first time by SunHee in chapter 18: "I believe you should move on" of her fanfic I Believe

"He was even more stupid than you are, but that doesn't mean you have to try to match his stupidnesslevel!"

Stupidnesslevel by PassionGirl October 8, 2013

stupidality 

Someone so stupid you have to create new words for them

I just hate listening to Fabian's stupidality.

stupidality by Quixsilver December 23, 2015

stupidt 

stupidt is something you call your friend. It doesn’t mean “stupid” it’s something you call them.

Sally: “2+2=5 right?”
Pamela: “No! it’s 4 stupidt!”

stupidt by immasnack May 28, 2020

stupidism 

Humans have too much power, so much so they cant comprehend the ends of superiority they have and thanks to enhanced self ego they fuck shit up and that clownfuckery is known as stupidism

as noun or whatever you want

stupidism will be the end of us

stupidism by Aslace0 October 31, 2022

Stupidiot

(Noun:)
A stupid idiot who is beyond stupid. Someone who lacks all human intelligence.

A insult used to describe a brain dead person or slacker.

A combination stupidity and idiocy.

A Ignorant, selfish, bully who doesn’t understand science or basic facts.

A lower class sleezbag.

“ don’t be a stupidiot!”
Variations include: stupidious, stupidiotisy and stupidiouslly.

Stupidiot by OrationWords November 3, 2022