What is the origin of sweating like a stuffed pig?

The phrase "sweating like a stuffed pig" is believed to derive from the practice of butchering pigs, which often involved them sweating due to stress or heat before slaughter. Historically, the expression highlights the irony that a "stuffed" pig, typically associated with being cooked or prepared, would not actually sweat. The phrase has evolved into a humorous way to describe someone sweating profusely, often in a state of stress or discomfort.