scum

Definitions of scum
1

n a film of impurities or vegetation that can form on the surface of a liquid

Types:
dross, scoria, slag
the scum formed by oxidation at the surface of molten metals
basic slag
slag produced in making steel; low in silica but having large amounts of calcium phosphate; useful as fertilizer
Type of:
film
a thin coating or layer

n worthless people

Synonyms:
trash
Type of:
rabble, ragtag, ragtag and bobtail, riffraff
disparaging terms for the common people

v remove the scum from

Type of:
get rid of, remove
dispose of

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