Top Definition
The act of defecation by a Deep Sea Diver no less than 15 minutes prior to Sup checks before entering a Hyperbaric Chamber or conducting diving operations. To prevent contamination and discomfort to others inside an enclosed space with foul human bodily fluids, fumes and major shits (I.e farts/gas/bubbleguts)
Doc forgot to take a shardin and 30 minutes into the dive he had to go while two other divers where in the chamber.

You better take your Shardin!!

Yo, you shardin yet?

Deep sea diver hdnd
by KDSA November 06, 2015
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