What is a Butterfly Knife?

Definition

A butterfly knife (also known as a balisong, fan knife, or Batangas knife) is a folding pocket knife with two handles that rotate around the tang of the blade, allowing the knife to be opened and closed by flipping the handles in a circular motion. The blade is concealed within the grooves of the two handles when closed, and the handles lock together to form a single grip when open. The butterfly knife is distinguished from other folding knives by its opening mechanism: rather than a thumb stud or assisted spring, the butterfly knife is opened through a flipping motion that requires practice and dexterity. The term “butterfly knife” derives from the way the handles move like butterfly wings during the opening and closing sequence. The knife originated in the Philippines, specifically in the province of Batangas, where it has been a traditional tool and weapon for over a century. The balisong (from the Tagalog words “bali” meaning “broken” or “folding” and “sung” meaning “horn,” referring to the handles originally made from carabao horn) is deeply embedded in Filipino martial culture and remains a symbol of Filipino craftsmanship.

Why It Matters

The butterfly knife matters because it is one of the most recognizable knives in popular culture, and one of the most misunderstood. In the Philippines, the balisong is a traditional tool, a weapon, and a status symbol. Skilled artisans in Batangas still hand-make balisongs using techniques passed down through generations, and the knife is a point of regional pride. In the United States and Europe, the butterfly knife has a different reputation: it is widely associated with street gangs, criminal activity, and youth culture, largely due to its cinematic appearances and its legal status as a restricted weapon in many jurisdictions. This dual identity—respected craft object in one culture, dangerous weapon in another—makes the butterfly knife a fascinating case study in how objects accrue meaning through context. The knife also matters because of its role in the “flipping” or “balisong manipulation” community. Enthusiasts around the world practice elaborate tricks, flips, and combinations with butterfly knives, treating the knife not as a weapon but as a skill toy similar to a yo-yo or a kendama. These practitioners often use trainer balisongs—blunt, unsharpened versions of the knife designed specifically for flipping practice without the risk of injury. The community has grown significantly through YouTube and social media, where flipper channels attract millions of views.

Example

> The old man in Batangas sat on a wooden stool outside his workshop, a half-finished balisong in his hands. He had been making these knives for sixty years. His father had made them. His grandfather had made them. The steel came from recycled car leaf springs. The handles were hardwood, carved and polished until they fit the hand like a memory. He did not think of the knife as a weapon. He thought of it as a tool, a craft, a piece of the province’s soul. A tourist approached, phone in hand, wanting a photo. The old man obliged. The tourist asked if he could flip the knife. The old man shook his head. “You don’t flip this one,” he said. “This one is for cutting. The ones you flip are toys. This is a knife.” The tourist did not understand the distinction. He bought a trainer balisong from the shop next door and posted a video of himself dropping it on the sidewalk. The old man watched without comment. He had seen many tourists. He had made many knives. The balisong would outlast them all. It had outlasted empires. It would outlast TikTok.

Internet Angle

On the internet, the butterfly knife exists in several distinct communities. In the balisong flipping community, YouTube and Instagram are the primary platforms. Channels like Squid Industries, BRS (Blade Runner Systems), and individual flippers post trick tutorials, reviews of new balisongs, and competition footage. The community has its own vocabulary: “aerials,” “chaplins,” “helix,” and “ladder” are all named tricks, and practitioners measure skill in terms of smoothness and complexity rather than martial application. On Reddit, r/balisong is a thriving community with over 100,000 members, featuring posts about new releases, technique advice, and collection showcases. In gaming, the butterfly knife is a recurring weapon in Counter-Strike: Global Offensive and Valorant, where it is one of the most expensive and coveted cosmetic items. In CS:GO, a butterfly knife “skin” can cost thousands of dollars on the secondary market, and videos of unboxing rare butterfly knives generate millions of views. The knife also appears in Call of Duty, Team Fortress 2, and numerous other games, where its distinctive flipping animation is a selling point. In legal and policy discussions, the butterfly knife is frequently debated: many U.S. states have laws restricting or banning balisongs, classifying them as “gravity knives” or “switchblades.” Online forums and legal advice websites feature constant threads about the legality of owning or carrying a butterfly knife in specific jurisdictions. In martial arts and self-defense content, the butterfly knife is discussed as a weapon, with tutorials on deployment, grip, and technique—though these are less common than flipping content. The knife’s internet presence is a perfect example of an object with divergent communities: one group treats it as a craft and skill toy, another as a gaming cosmetic, another as a weapon, and another as a legal problem. These communities rarely interact, and their conflicting perspectives on the same object create a fascinating cultural tension.

Related Terms

Balisong — The Filipino term for the butterfly knife; the preferred term among enthusiasts and traditionalists
Trainer balisong — The blunt, unsharpened version used for flipping practice
Flipping — The art of manipulating a butterfly knife through aerial tricks and handle rotations
Batangas — The Philippine province where the balisong originated and where traditional craftsmanship continues
Folding knife — The broader category of knives that includes the butterfly knife
Gravity knife — The legal category that some jurisdictions use to classify and restrict butterfly knives
Counter-Strike: Global Offensive — The video game in which the butterfly knife is one of the most valuable cosmetic items
Valorant — Another popular game featuring a butterfly knife as a premium melee skin
Blade Runner Systems (BRS) — One of the most respected American balisong manufacturers
Squid Industries — A major manufacturer of trainer balisongs and a central brand in the flipping community