Gurkha Knife

The Kurki is heavy, curved Nepalese knife used as both tool and weapon. It is also a part of the regimental weaponry and heraldry of Gurkha fighters. The name of these knives can be spelt and pronounced numerous ways. The most common names are Kukri, and Khukuri. The Kukri design is centuries old with the blades typically between 12 to 15 inches long. There are however smaller knives with 6 to 8 inches blades and ceremonial versions ranging from 24 to 28 inches. Kukri sheaths normally hold 2 traditional small knives called the karda and chakmak. The chakmak is for sharpening the blade and starting fires with flint and the karda is for skinning. All Kukri knives have a notch at the base of the blade near the handle it is called the cho or kaudi. The sheath or scabbard is usually made of wood with a leather covering and a brass cap at the end. These knives are mostly made in Nepal or India and a majority of them are hand crafted.

Mortal Kombat
Kai makes use of this weapon in Mortal Kombat 4 and Mortal Kombat Gold.

Reference
http://www.random-abstract.com/kukri/