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

Stupidity 

donald trump

The definition of stupidity is Donald Trump.

Stupidity by frostygacha March 27, 2020

studid

stupid and stunned

she was studid to discover her man cheater on her for the 8th time this year.

studid by roya hates everyone November 25, 2018

Stupink 

Having the ability to think anything but avoiding thinking at all costs.

"Bro stupink for genetic. It not fix.

Stupink by birdspit November 16, 2022

stuipid 

wow your so stuipid you dont even know how to spell stupid

your a stuipid as hell

stuipid by Subtochaoticcoops November 29, 2022

Excess tax on stupidity 

noun - the lottery. Some consider it the tax on stupidity because the proceeds go to the state, and only the stupid pay it.

John: I got to buy my big lotto ticket!
Jack: Oh, you have to pay your excess tax on stupidity!

Excess tax on stupidity by Corn Flake December 6, 2006

Stupiphany

The sudden realization that you have been stupid for way too long. The light goes on, and you realize with a "Duh!" that your behavior needs to change.

When an "Ah-ha!" is the result of something that should have been obvious.

Stan had a "stupiphany" that doing the same thing over and over and expecting different results was not working.

Stupiphany by Strangefruit January 9, 2006