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1) (n) A hole placed in the side of a pipe or bong. A thumb is placed over it while taking a hit and released just before the use is done inhaling for the purpose of clearing the smoke from the chamber of the device.
2) (n) Abbreviation of carburetor, the part of a 4-stroke internal combustion engine for the purpose of mixing oxygen and petroleum (gasoline).
3) (n) Abbreviation of carbohydrate, a biological compound for the purpose of storing energy.
1) Clear the chamber, release the carb!
2) My carb is busted, I'll stop by the mechanic and get it fixed later.
3) That single french fry probably has 20 grams of carbs in it!
by Geist May 21, 2005
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The hole found on pipes and bongs, it allows you to clear the chamber that is found on these devices. You hold your finger over it while smoking the device, and let go when you want to clear it.
by Root January 08, 2003
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This word is a simple shortening of the term "carburetor" used by marijuana smokers to refer to the carburetors on thier pipes. Generally these carbs occur on handblown glass pipes, or smaller wooden or metal pipes. The idea behind the carb is to cool the smoke by allowing fresh air in to mix with the smoke in the chamber. This results in smoother hits, and less coughing.

Another common term used for carburetor is rush.
Bill scrapes the resin out of his pipe through the Carb hole.
by Dilcue October 23, 2004
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short term for "(not) Care", "I don't give a shit." Often used as an expression.
"I had such a wonderful trip to Boston!"

"I really carb about the F's on my report card: I'm already accepted into the college I wanna go to."
by BC>Bosco September 14, 2008
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One unit of concentrated evil. Each gram has over 250 grams of fat inside it. Removing them from your food, water, and air removes the necessity of exercise, and allows full consumption of saturated fat as long as it has no carbs.

Synonyms: food of the devil, concentrated evil, little bits of antichrist.

see carbohydrates
Do you have a non-carb section? I'm worried the sidestream carb inhalations will give me fat cancer.
by Daniel B. Munro December 02, 2005
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