skim off

skim something off (of) something and skim something off 

1. Lit. to scoop something off the surface of something. (Of is usually retained before pronouns.) The cook skimmed the fat off the stew. The cook skimmed off the fat.

2. Fig. to remove a portion of something of value, such as money, from an account. (Of is usually retained before pronouns.) The auditor was skimming a few dollars a day off the bank's cash flow. Kelly skimmed off a few dollars each day.

See also: skim

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skim off something also skim something off

to take something valuable The colleges with very high standards skim off the best high school graduates. State and local governments skim tax money off the company's profits.

Etymology: based on the literal meaning of skim off ( to remove something floating on a liquid)

See also: skim