Definitions:
an omnivorous domesticated hoofed mammal with sparse bristly hair and a flat snout for rooting in the soil, kept for its meat.

a greedy, dirty, or unpleasant person

a police officer

an oblong mass of iron or lead from a smelting furnace.

a device which fits snugly inside an oil or gas pipeline and is sent through it to clean or test the inside, or to act as a barrier.

gorge oneself with food

(of a sow) give birth to piglets; farrow.

operate a pig within an oil or gas pipeline