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the combonation of retarded and ridiculous.
allison- "mike yelled at me cuz he said that was too racist..."
me- "thats retarculous!"
by madden March 12, 2005
Both retarded and ridiculous
We're going to invade England? That's retarculous
by squid September 26, 2003
A portmanteau of "retarded" and "ridiculous".
You look retarculous in that fuzzy purple top hat.
by epistocratles December 16, 2010