pig
The literal meaning refers to the animal, but in a social context, it carries a strong negative connotation of lack of self-control, whether regarding food or cleanliness. When applied to people, it is an insulting term. It suggests a visceral sense of disgust and selfishness. While 'glutton' is more formal and focused specifically on eating, 'pig' implies a broader messiness or lack of manners. In modern slang, the verb form is often used less harshly (e.g., "pigging out") to describe occasional overindulgence, whereas calling someone "a pig" remains a sharp personal attack.
Countable when referring to the individual animals on a farm or a greedy person ('He is such a pig'). Uncountable when referring to the meat of the animal, though 'pork' is more common.
Meanings
An omnivorous hoofed mammal of the family Suidae, commonly domesticated for meat.
"The farmer fed the pig with a bucket of corn."
A person who is greedy, gluttonous, or untidy.
"Don't be such a pig; leave some cake for the others!"
To eat greedily or excessively.
"He decided to pig out on pizza during the movie marathon."