Someone who is just too stupid to only be called a Retard or an Idiot.
NIck: There's only 28 days in February.

Kevin: Is it leap year..?

Nick: You're such a retidiot.
by Jory1234 March 25, 2009
Top Definition
a person that is slow to learn from thier idiotic ways.
My dog the retidiot kept eating its vomit.
The retidiot girl slamed her hand in the automatic doors again.
by Cookie of LA March 22, 2009
The word retidiot is a joining of two words together "ret*rd" and "idiot" and is used a offensive term but usually made in jest.
That matthew is a retidiot
by look up the word dramality December 15, 2011
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