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The Collaborative International Dictionary of English v.0.48 (gcide)

Scum \Scum\ (sk[u^]m), n. [Of Scand. origin; cf. Dan. & Sw.
skum, Icel. sk[=u]m, LG. schum, D. schuim, OHG. sc[=u]m, G.
schaum; probably from a root meaning, to cover. [root]158.
Cf. {Hide} skin, {Meerschaum}, {Skim}, v., {Sky}.]
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1. The extraneous matter or impurities which rise to the
surface of liquids in boiling or fermentation, or which
form on the surface by other means; also, the scoria of
metals in a molten state; dross.
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Some to remove the scum as it did rise. --Spenser.
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2. refuse; recrement; anything vile or worthless.
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The great and innocent are insulted by the scum and
refuse of the people. --Addison.
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Scum \Scum\, v. t. [imp. & p. p. {Scummed}; p. pr. & vb. n.
{Scumming}.]
1. To take the scum from; to clear off the impure matter from
the surface of; to skim.
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You that scum the molten lead. --Dryden &
Lee.
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2. To sweep or range over the surface of. [Obs.]
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Wandering up and down without certain seat, they
lived by scumming those seas and shores as pirates.
--Milton.
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Scum \Scum\, v. i.
To form a scum; to become covered with scum. Also used
figuratively.
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Life, and the interest of life, have stagnated and
scummed over. --A. K. H.
Boyd.
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