pig
n//pɪɡ//gris, svin, snut
(countable) Any of several mammalian species of the family Suidae, having cloven hooves, bristles and a snout adapted for digging; especially the domesticated animal Sus domesticus.
(engineering) A device for cleaning or inspecting the inside of an oil or gas pipeline, or for separating different substances within the pipeline. Named for the pig-like squealing noise made by their progress.
(derogatory, slang) A police officer. [From ante 1785.]