However, it's important to note that this phrase is rarely used in its literal sense. It's more commonly used as a slang term to describe someone who is greedy, selfish, or miserly.
Think of it as a playful way to call someone a "cheapskate" or a "hoarder."
Here's how you might use it in a sentence:
* "Mi hermano es un chanchito malo, nunca quiere compartir sus juguetes." (My brother is a bad little pig, he never wants to share his toys.)
While it can be used in a lighthearted way, remember that it's still considered slightly negative, so use it with caution and only among people you know well.