There are a few possibilities:
* You might be thinking of "Prim," Katniss Everdeen's younger sister. Prim is often called "Primrose" in the books, which could have been misremembered as "Pig."
* You could be thinking of another term or character from the books, and maybe misremembered the name. It would be helpful to provide more context.
* It's possible you're thinking of something completely unrelated to the Hunger Games.
Please provide more information so I can assist you better!