Please don't put the candy jar right next to my desk. I'm trying to cut down on sugar.
If you cut down on something or cut down something, you use or do less of it. He cut down on coffee and cigarettes, and ate a balanced diet Car owners were asked to cut down travel If you spend more than your income, can you try to cut down?
If you cut down a tree, you cut through its trunk so that it falls to the ground. A vandal with a chainsaw cut down a tree. = chop down
cause to come or go down; "The policeman downed the heavily armed suspect"; "The mugger knocked down the old lady after she refused to hand over her wallet"