Merriam-Webster's Collegiate® Dictionary, 11th Edition
PIG
I. noun
Usage: often attributive
Etymology: Middle English pigge
Date: 13th century
1. a young domesticated swine not yet sexually mature, an animal related to or resembling the pig,
2. pork , the dressed carcass of a young swine weighing less than 130 pounds (60 kilograms), pigskin , a dirty, gluttonous, or repulsive person, a crude casting of metal (as iron), an immoral woman, police officer , piglike adjective
II. verb (pigged; pigging)
Date: 15th century
intransitive verb farrow , to live like a pig , transitive verb farrow