skum

Noun

scum (countable and uncountable, plural scums or scum)

1. (uncountable) A layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).
   • During smelting, scum rises to the surface and is then removed by the smelter.

   Synonyms:

   dross, impurity, impurities, cinder, scoriae, slag

2. (uncountable) A greenish water vegetation (such as algae), usually found floating on the surface of ponds
   • These organisms form scum in large quantities.
3. The topmost liquid layer of a cesspool or septic tank.
4. (US, slang, uncountable) Semen.
   • Horse, who was always talking about facts, said, “Man, that can't be scum, ’cause scum is white.”1965, Claude Brown, Manchild in the Promised Land, New York: New American Library, →OCLC, page 80

   Synonyms:

   baby batter, baby gravy, balljuice, boy juice, cock juice, cock snot, come, cream, creme, cum

5. (derogatory, slang) A reprehensible person or persons.
   • People who sell used-up pens are scum, just total low-lives.

   Synonyms:

   bastard, assbag, assbreath, assbucket, asschunk, asscunt, assface, assfag, assfaggot, assfuck

See all 11 meanings of scum