What is "gerb"

n. A firework that produces a fountain of sparks

A gerb is a type of firework which produces a jet of sparks, usually lasting between 15 and 60 seconds. It is a thick-walled tube filled with pyrotechnic composition and possessing a choke, which is a narrowing in the tube. Gerbs are often referred to as 'fountains'.

Sometimes a small charge of black powder is added to the bottom of a gerb to make it finish with a bang: this charge is known as the 'bounce'. These are commonly used at sporting events.

Gerbs intended for use indoors near a proximate audience, such as at a rock concert, typically have shorter durations (from 1/8 to 30 seconds) and heights (4 to 50 feet).

Gerbs are usually measured in terms of time and height. For example, a 4x4 burns for 4 seconds at a height of 4 feet.

Eric Newby's book The Last Grain Race (chapter two Mountstewart) contains a 1938 reference to what appears to be the original gerb - in effect a mortar bomb fired from a mortar.

Gerb may refer to:

• Gerb (pyrotechnic), a standard pyrotechnic device.
• Gerb, a race in the Star Wars universe.
• GERB, a Bulgarian political party.
• GERB, a satellite instrument.
• Yarden Gerbi (born 1989), nicknamed "Gerb," Israeli judoka world champion