"Rug up, it's brass monkeys out there this morning."
Where "Brass Monkeys" Comes From
The phrase comes from an old (possibly apocryphal) naval story about "brass monkeys" — racks used to stack cannonballs — supposedly contracting in extreme cold until the balls fell off the rack.
Whether or not the naval origin story is historically accurate is debated by etymologists, but the phrase stuck firmly in British and Australian slang as a vivid way to describe freezing conditions.
How Aussies Actually Use It
"Brass monkeys" is used almost exclusively to describe genuinely cold mornings or winter weather, often shortened from the full, cruder version of the phrase for polite company.
It's especially common in southern Australian states and Tasmania, where proper cold weather is more of a regular occurrence than in the tropical north.
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