The term "fang" refers to a sharp, pointed protrusion on an animal's mouth. It is commonly associated with carnivorous animals such as dogs and cats, but can also be found in other species like bats or certain types of fish. Fangs are used for biting and tearing into food, and they vary in size and shape depending on the animal. In popular culture, fangs are often associated with vampires, who use them to feed on blood.