carb 1
/kahrb/ , n. Informal.
a carburetor.
[ 1950-55; by shortening ]
carb 2
/kahrb/ , Slang.
n.
1. carbohydrate.
v.i.
2. to eat large quantities of carbohydrates before a major physical exertion in order to store up energy (usually fol. by up ): Some marathon runners carb up on spaghetti the night before a race.
[ by shortening of CARBOHYDRATE ]