Everyday words derived from sailing: “Slush fund”
The money obtained by the cook selling slush ashore. Used for the benefit of the crew (or the cook).
“What is slush?”, you may ask…
Well, it’s a greasy substance obtained by boiling or scraping the fat from empty salted meat storage barrels, or the floating fat residue after boiling the crew’s meal. In the Royal Navy the perquisite of the cook who could sell it or exchange it (usually for alcohol) with other members of the crew.
Used for greasing parts of the running rigging of the ship and therefore valuable to the master and bosun.