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Another way of saying phantom turd when all your friends over use that phrase.

When you poop and it disappears into the U-bend of the toilet and there is no residue on your toilet paper.
"Am i imaging things? I just pooped and it's no where to be seen. It was an invisiturd."
by Bryan St. Bryan May 18, 2009
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When you take a shit and it falls down the bend in the toilet before you flush, hiding it from sight.
Person 1-'Dude, I swear I just crapped...'
Person 2-'Musta' been an invisi-turd'
by 7cosmo1234 May 01, 2011
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