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The annoying piece of meat that falls out the end of a taco when you bite into it.
*bites* (piece falls out) "damn! There goes the taco turd!"
by Fool22 July 09, 2010
Any unidentifiable crusty brown substance typically found, but not limited to the lap of pants.
"There's a taco turd on my sunglasses."

"Hey dude, there's a taco turd on your shirt."
by pwrsurge13 January 14, 2008