retarditude 

One who is not actually retarded, but has the attitude of a retard because they don't have a functioning reproductive organ and their FUPA is gigando.

Suck my wanger, retarditudes.

retarditude by Jim November 10, 2003

retarditus 

a very lethal disease that makes you so incredibly stupid.

Hey bro you have retarditus

retarditus by fboiretard April 10, 2019

Retarditus 

Retarditus, another way of saying somebody is a retard and adding more of an insult with the 'itus' by implying that they have it as a disease.

Daniel "Your such a fuckin twat!"
Person "Yet another case of Retarditus..."

Retarditus by KtKornStar August 15, 2004