skim means: Cream can be removed from milk’s surface by removing fat and grease from gravies or sauces, or foam from jams and jellies or broths during cooking. (in Cooking Dictionary)

What else does skim mean?

You can remove impurities from the liquids by removing the scum or fat. This can be done using a flat, slotted spoon. (in Cooking Dictionary)

Remove floating matter from liquids (in Merlin Dictionary)

You can embezzle money by taking small amounts on every transaction. (in Merlin Dictionary)

Failure to report a portion of certain income (such as winnings), to avoid paying tax. (in Merlin Dictionary)

Copy information from (a credit-card) in order to commit skimming fraud. (in Merlin Dictionary)

A thin layer is used to cover or coat the surface. (in Merlin Dictionary)

Throw so that you bounce or slide. (in Merlin Dictionary)

A surface that allows you to glide quickly or move along it. synonym : brush . (in Merlin Dictionary)

A quick glance or reading of a book. (in Merlin Dictionary)

Touch lightly, or only superficially. (in Merlin Dictionary)