gravity knife

Meaning

Noun

• A type of knife that with the press of a button, allows the blade to drop out of the handle, and then quickly opened up full, for quick use. This form of knife also allows it to be flicked open with a flick of the wrist.

Related

Narrower meaning words

• paratrooper knife

Origin

• gravity + knife.
• From being a folding knife that could be opened by allowing gravity to draw out the blade.