Retardednes 

The supreme act of being absolutely retarded. Very rare and uncommon.

Ben: Have you realized that Mr. Farrell doesn't know our names and he's known us all year?
Dylan: Only one word can describe Mr. Farrell: Retardednes

Retardednes by TheCompetitionWinner April 20, 2012

retardedism 

Someone who is more than reatared and has a sickness of being stupid

I thick he he has retardedism

retardedism by Crazy@C May 20, 2017

retardedment 

(Also pronounced retaddedment)

The highest level of being retarded. One you must work hard to accomplish and once you get there you can't get any better so you have no choice but to retire at that point you have reached retardedment. Then you must go to a retardedment home for the rest of your retadded life

Hey look at mark over there he is so lucky he has reached retardedment. It is something I look forward to someday

retardedment by Jwrules May 7, 2016

Retardeder 

The act of being MORE retarded than the person you are calling retarded.

He is so much more retardeder than his brother is.

Retardeder by Bacita Mae Jenkins March 22, 2022

retardness 

state or level of retardation

larry's retardness is rediculous this is the third time this week he locked himself in the bathroom.

retardness by garrett10121 August 28, 2008

retardeder 

adj. (even) more retarded

Damn! I thought that guy was an idiot, but his friend is even retardeder! I mean, he is D-U-M dumb!

retardeder by freakomatic May 15, 2006

retardede 

A person who cant spell retarded.

Person one texting: Your so retardede
Person two texting: Retarded*

retardede by This Is Interesting October 6, 2020