Origin d Modern thy Swear Words 1
Shit - Certain types of manure used to be
transpired by ship. In dry form it weighs a lot
less, but once water hit it, it not only became
heavier, but the process of fermentation began
again, of which a buyproduct is methane gas.
As the manure was stored below decks
bundles, you can see what could (and did)
happen: mathan began to build up below decks,
and the first time someone went below deck at
night while at sea with a lantern, BOOM!
Several ships were destroyed in this manner
before it was discovered what was happening
After that, the bundles of manure were always
stamped with the label S. H. l. T. which meant to
the sailors to: "Ship High In Transit."
in other words, high enough off the lower decks
so that any water that came into the hold would
not touch this volatile cargo and start the
production of methane.