Hey, Faldage! the phrase "slush fund" popped up in my slushy brain, so I looked it up. I had heard of it as money
set aside for unexpected expenses, but had no idea it started as a nautical term!
slush fund
1 orig., a fund established aboard ship from the sale of refuse fat, etc. and used to buy small luxuries
2 money used for bribery, political pressure, or other corrupt purposes