to remove the scum (from sth)

См. также в других словарях:

• skim — [skım] v past tense and past participle skimmed present participle skimming [Date: 1400 1500; Origin: Perhaps from scum to remove scum (14 19 centuries), from scum (noun)] 1.) [T] to remove something from the surface of a liquid, especially… …   Dictionary of contemporary English