(v.)- This occurs when one takes a dump and it shoots right out of the anus like a rocket and sinks to the bottom of the toilet bowl, hence the term "scuba." One usually does not have to wipe after this furious anal blast because the exit was so clean.
Your poop scuba dives to the bottom of the toilet bowl and there is no need to wipe, hense Scuba-Shit.
by CadetSmoke November 2, 2006
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Taking one’s tuba, and sticking it in thyne anus, then proceeding to defecate in the said snorkel, in attempt to make the snorkeler breathe the excrements, ultimately leading the permanent respiratory problems due to the poor air quality of the human waste.
Felix is scuba-shitting in his cousin’s snorkel.

« Ha, my cousin will perish! »-Félix
« What is my cousin doing putting my scuba in his anus?.. Oh, he is scuba-shitting! »
by TartinoBurr December 27, 2018
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