Fang is a term that can refer to a long, sharp tooth found in various animals, including snakes, carnivorous mammals, and some insects. These teeth are often used for grasping, tearing, or injecting venom into prey. In many species, fangs play a crucial role in their feeding and survival. In popular culture, "Fang" can also refer to characters in books and movies, such as Fang from the Harry Potter series, who is a large dog belonging to Rubeus Hagrid. Additionally, "Fang" is sometimes used as a nickname for characters known for their fierce or intimidating nature.