1 definition by J-FizzleNizzle

Top Definition
Severe mental retardation caused by a major deficiency in the thyroid gland.

A rather entertaining insult used by intelligent people to describe people who won't get the meaning of the insult even after a second or third explanation.
Intellectual: "You're rather cretainous, aren't you?"
Cretin: "HUR?"
by J-FizzleNizzle November 29, 2008

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