CARBS

Clipping of carburettor / carburetor.

"This is what controls the flow of fuel into the carb."

(nutrition) A sugar, starch, or cellulose that is a food source of energy for an animal or plant.

"These microbes are primarily responsible for breaking down cellulose and other carbohydrates into volatile fatty acids (VFAs)."

(by extension, metonym) Any food rich in starch or other carbohydrates.

"I'm cutting down on carbohydrates like bread and pasta."