Here's what it likely means, depending on the context:
1. A cheaper, less desirable animal:
* Goat: Goats are often used as a source of milk and meat, similar to cows, but are generally less expensive to raise and maintain.
* Sheep: Sheep are another option for milk and meat, though their milk is typically used for cheese.
2. A substitute for cow products:
* Soy milk: This is a plant-based alternative to cow's milk.
* Other plant-based milks: Almond milk, oat milk, and rice milk are also popular substitutes.
* Tofu: This is a soybean-based product that can be used in place of meat.
3. A less expensive way to get milk:
* Powdered milk: This is a cheaper alternative to fresh milk, though it might not have the same flavor or nutritional value.
Ultimately, the "poor man's cow" is a flexible term that can refer to different things depending on the individual's needs and resources.