Fastest and most efficient processor ever. Created by Apple and IBM, after Apple ditched Motorola (A cell phone company) and callaborated with IBM to form the G5. The only current mac to have the G5 processor is the Powermac G5, and most people often refer to the powermac as just the "G5." The G5 is not exactly the most liked Mac by other Mac users, but everyone knows that it is indeed the fastest. Several nicknames for the G5 exist, these include: Cheese grater, Refrig-o-mac, PC, ugly shit. These are usually due to the fact that its not the most pretty Mac around. And its big boxy nature. The term cheese grater was formed because the front of the Powermac G5 has tiny holes, which make it look like a cheese grater.
Damn foo' look at that huge cheese grater, I mean G5.
This G5 is a very very fast personal computer.
by Marijuana August 7, 2004
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G5 Howitzer

The G5 Howitzer is a South African towed indirect artillery battery. It was introduced in 1981. It has an engine, which allows it to go about 16km/h for short distances. The engine also controls trails and firing platform. There is no power traverse or elevation. The G5 can be fired in most terrains, including soft or sandy.

Type: semi-mobile indirect artillery
Dimensions: length 11m; width 8.7m; height 2.3m
Diameter: 155mm
Caliber: 45
Tow Speed: on-road 90km/h; off-road 50km/h; cross-country 15km/h
Self-Propelled Speed: on-road 16km/h; off-road INA; cross-country 3km/h
Direct Range: 3km
Indirect Range: 40km
Rate of Fire: 2 rpm
The G5 fired a long range round at the advancing Cuban forces.
by Rot April 7, 2005
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A group of people with the common interest of smoking marijuana in public places... car parks, streets etc. Originated in the North East of England (2010.)
Look at those G5'ers they've smoked so much I think the blonde girl is going to collapse!
by G5err December 5, 2010
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A badass hunting equipment company
Shit you can't even buy at Walmart

Mentioned in Jesse McCartney's song "Leavin'"
Why don’t you tell him that I’m leavin’ never to come back again
You found somebody who does it better than he can
no more making you cry, no more them gray skies
girl we flying on the G5 G5
by Siomha May 8, 2008
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1.) A group of Students:
D-LuX,SeaBass,Mr.AssMan,Suicide King,And J'Me

2.) Ray Alen
As Ray Alen used to say "bend your Knees and do the G5"
by G_ October 24, 2008
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short for the g500 luxury sport truck from mercedes benz
im down to try my luck
see if i can finger fuck in the truck
g5, 50's so live

crazy by 50 cent (God's Plan - 2002)
by g cams August 12, 2007
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Type of dance popularized by music artist T-Pain where one imitates the G5 Jet by having their arms out on their sides. Often demonstrated after one bends their knees getting low while dancing at a club. May have derived from the "Hyphy" movement of the Bay Area and if not, has been adopted by the movement.
"...just bend your knees and do the G5," - T-Pain.
by brysturr September 6, 2007
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