its when you take a shit in the ocean. Usually after the doing the big brown water snake floats up next to you.
dude i was at the beach yesterday, and that mexican food fuckin' got to me. Thank god i was wearing bord shorts cuz i took the fattest fucking aqua turd in the world.
A turd that is in composition at least 60% liquid.
Ol' BJ killed my grass with his aqua turd.