An "earth pig" can refer to two primary meanings:

1. In Chinese astrology, the "Earth Pig" is a zodiac sign associated with people born in certain years (e.g., 1959, 2019). Earth Pigs are characterized as kind, thoughtful, down-to-earth, and sensitive. They have qualities such as being hardworking, social, loyal in relationships, nurturing, and having a good sense of humor. They are known for their strong family values and ambition but may also have traits like sensitivity and emotional immaturity.

2. "Earth pig" is also a colloquial term for the aardvark, an animal native to Africa. The aardvark is a medium-sized, burrowing mammal with a pig-like snout, and its name in Afrikaans literally means "earth pig" due to its burrowing habits. It feeds mainly on ants and termites and has a stout body with thick skin.

So, depending on context, "earth pig" can either refer to the Earth Pig in the Chinese zodiac or the aardvark animal known for its burrowing and pig-like snout.