- 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. - refuse; recrement; anything vile or worthless.
2 . Scum
[ v. i.]
- To form a scum; to become covered with scum. Also used
figuratively.
3 . Scum
[ v. t.]
- To take the scum from; to clear off the impure matter from
the surface of; to skim. - To sweep or range over the surface of.