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1.
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
 
2.
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