The phrase "wild pigs" refers to pigs that live in the wild, rather than being domesticated or kept on farms. They are free to roam, find their own food, and live in natural habitats. Full definition
Stop at the island for some lunch and take some time to swim in the tranquil waters surrounding the area or say hello to the friendly resident wild pig. (casasdesoleil.com)
Then, we came across a large group of sleeping wild pigs. (2checkingout.com)
The big cats could return to do the job they once did in Brazil's grassland — hunt a growing population of wild pig relatives, called peccaries, that decimates crop yields (scientificamerican.com)