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1.
to remove or devein shrimp or crawfish.
I am not eating that shrimp until you de-turd it.

I only eat crawfish that have been de-turded.
by Fart Jarfunkle February 16, 2011
 
2.
A word which was coined in the basement of Coate Hall. It has no real meaning, but is used when one needs to laugh at the coin-ees (lack of) intelligence.
Kirk was deturd when he heard how wrong he was.
by Stephanie111 December 12, 2007