to cover, as a liquid, with a thin film or layer: Ice skimmed the lake at night.
7.
to take the best or most available parts or items from: Bargain hunters skimmed the flea markets early in the morning.
8.
to take (the best or most available parts or items) from something: The real bargains had been skimmed by early shoppers.
9.
Metallurgy. to remove (slag, scum, or dross) from the surface of molten metal.
10.
Slang.
a.
to conceal a portion of (winnings, earnings, etc.) in order to avoid paying income taxes, commissions, or the like on the actual total revenue (sometimes followed by off): The casino skimmed two million a year.
b.
to take, remove, or appropriate for illegal use: to skim information from another's credit card.
c.1420 (skimmer, the utensil, is attested from c.1392), "to clear (a liquid) from matter floating on the surface," from O.Fr. escumer "remove scum," from escume (Fr. écume) "scum," from a Gmc. source (cf. O.H.G. scum "scum," Ger. Schaum; see scum). Hence, skim milk (1596),
from which the cream has been skimmed. Meaning "to glance over carelessly" (in ref. to printed matter) first recorded 1799; that of "to move over lightly and rapidly" is from 1697. Skimmer, the N.Amer. shore bird (1785), so called from its method of feeding.