Someone having to look up retardation on the Urban Dictionary is absolute retardation.

You are the absolute definition of Retardation.

Some countries are such retardations.

retardation as in>We could always for back on the more retarded method of marking our trail with pickaxes if we ran out of paper to throw down.

I Caly am a retard, and i have a degree in retardation.

My friend is going through retardation.

Rodolfo suffers from the deadly disease known as retardation!