Stupididness 

Used to describe something that was obviously conceived of some irrational thought.

That book is full of stupididness. Whoever wrote this pile was full of Austininity.

Stupididness by Johnson brothers February 24, 2004

stupidness 

a dumb fucking word that if used, ironically, means the speaker is stupid.

Speaker 1: Man, I'm so sick of all the stupidness in politics these days.

Speaker 2: Dude, what are you, a 7 year old? It's stupidity, dumbass. Stupidness isn't a word.

stupidness by Luke D April 26, 2008

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

stupidityness 

The act of being mentally dumb af; most commonly found in males from the height of 5’4 to 5’5.

Bobby Craig has an undiagnosed disease of stupidityness

stupidityness by Beefucker6969 December 3, 2017

stupidiness 

The word stupidiness is a variation of the word stupidity. It was first used on accident by a person who cannot speak English properly (obv.) Use of this term has become a way to make fun of the person who first uttered it.

The stupidiness of these people!

stupidiness by Dave Berlin April 8, 2005

Stupidness 

Describing how stupid/acknowledging how much of an imbecile one is being.

Teen: I'm gonna get in this shopping cart and fly off the roof!

Parent: That's the stupidest thing I've ever heard. I can just FEEL your stupidness levels rising.

Stupidness by Kazaen June 30, 2011

Stupiderness 

The act of making something more stupider than previous, as in a level of stupiderness or moronicism.

The movie Salt exceeded the tolerance level of stupiderness.

Stupiderness by Fourman January 3, 2013