1 definition by Mr. French

The act of giving someone fellatio, while submerged in a bath tub. Stipulations include, the giver wearing a snorkel, and the receiver defecating a floater so it bumps into the givers head, effectively acting as the shark.
Bill- "That was a great shit-shark! Hopefully we can do it again sometime?"
Sarah- "I don't think so, my head is bruising."
by Mr. French February 29, 2012
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