buttertfly knife 

A knife blade affixed to two halves of a handle via a hinge. Also named balisong.

buttertfly knife by Anonymous October 11, 2003

Butterfly knife 

With just a flick of the wrist, you go from harmless citizen to vicious, knife-weilding warrior. Same stigmas as a swithblade apply; see dangerous, lethal, scary and gangster. Although no more lethal than any other sharp object (see rock, nail and razor for examples), the media has turned it into something it never was.

Technical definition: balisong

Commonly mistaken as: switchblade, illegal

That flashy looking device I opened with one hand was a butterfly knife.

Butterfly knife by James September 12, 2004

Butterfly Knife 

(noun) A knife blade placed between two loose and rotatable handles. Used to do tricks.

Insert butterfly knife example here.

Butterfly Knife by dontmindmejuststealingyourmeme April 8, 2017

Butterfly Knife 

Also called balisong or batanga. Not to be mixed with butterfly sword. A knife where the handle is in two parts, and the parts can be rotated around so they enclose the knife to hide the blade. With the right technique, very easy and fast to open. Illegal in many countries, because, like switchblades, they're easy to conceal. Baliswords also exist, often over two feet when opened.

I thought that I had a chance in this fistfight, until suddenly he had a butterfly knife in his hand. Luckily i brought my butterfly sword.

Butterfly Knife by Nicohasa October 27, 2008

Butterfly Knife 

A blade with two swinging handles and a latch to hold the other handle closed, some butterfly knife's are used for stunts

They are also commonly referred to as balisongs

Hey look at Mike's butterfly knife

Butterfly Knife by FlipplyMan August 27, 2017

spys.butterfly.knife 

A rare species who scares me and anyone who's ever been on there account

Bitch 1: yo why are you hiding
Bitch 2:I'm hiding from spys.butterfly.knife

spys.butterfly.knife by Misspaloa September 10, 2021

Butterfly Knife 

A knife used mostly for tricks and other knife things. Illegal in most countries because you can conceal it easily.

You: Holy Fuckles is that a Butterfly Knife?
Me: Yes.

Butterfly Knife by GameBoyAdvance November 10, 2018