A butterfly knife, also known as a balisong, is a type of folding knife that features two handles that rotate around the blade's pivot. When opened, the handles fold back to reveal the blade, which can be quickly deployed with a flick of the wrist. This unique design allows for impressive tricks and flips, making it popular among knife enthusiasts and performers. The butterfly knife has a rich history, originating in the Philippines, where it was used for self-defense and utility. Today, it is often seen in movies and martial arts, showcasing its stylish appearance and versatility. However, due to its potential for misuse, many places have regulations regarding its ownership and carry.