pig 
(pĭg)
(pĭg)n.
1.
a. Any of various mammals of the family Suidae, having short legs, hooves with two weight-bearing toes, bristly hair, and a cartilaginous snout used for digging, including the domesticated hog (Sus scrofa subsp. domestica syn. S. domesticus) and wild species such as the bushpig.
b. A domesticated hog, especially when weighing less than 54 kilograms (120 pounds).
c. The edible parts of one of these mammals.
2.
a. Informal A person regarded as being piglike, greedy, or disgusting.
b. Derogatory Slang A police officer.
c. Slang A member of the social or political establishment, especially one holding sexist or racist views.
3.
a. A crude block of metal, chiefly iron or lead, poured from a smelting furnace.
b. A mold in which such metal is cast.
c. Pig iron.
intr.v. pigged, pig·ging, pigs
Phrasal Verb: To give birth to pigs; farrow.
pig out Slang
Idioms: To eat ravenously; gorge oneself: pigged out on cake.
in a pig's eye Slang
Under no condition; never.
pig in a poke
Something that is offered in a manner that conceals its true nature or value.
pig it Slang
To live in a piglike fashion.
[Middle English pigge, young pig, probably from Old English *picga.]