tardtactular 

Someone that is such a retard in every single way, that simply calling them a tard doesnt do them justice

Hey stupid?!? Can you comprehend a damn thing??? You are tardtactular man, seriously...."

tardtactular by Munkstress August 27, 2005

turdtacular

The feeling you get when you take a huge shit.

After eating twenty-five donuts, the shit I took felt turdtacular.

turdtacular by Shaqburger June 30, 2003

tardacular 

1. The overdose of acting retarded.

2. A random outburst of stupidity

"Did you see John stack it in front of the whole school"
"Yeah it was Tardacular"

tardacular by UFC Banterweight Champion August 8, 2016