Scum

Scum or S.C.U.M. may refer to:

Soap scum, an informal term for the white solid that results from the addition of soap to hard water
Impurity that accumulates at the surface of a liquid (especially water or molten metal)
Dross, solid impurities floating on a molten metal
Algae or similar vegetation found floating on the surfaces of ponds
The topmost liquid layer in a septic tank, mainly consisting of fats

Games and sport

Scum (video game), an upcoming open-world survival video game
Scum (card game), a card game in which players race to get rid of all of the cards in their hands
S.C.U.M. (professional wrestling), a professional wrestling stable
"Scum" or "scummers", a derogatory nickname for English football club Southampton F.C., used by supporters of rivals Portsmouth

Scum, novel by Isaac Bashevis Singer translated from the Yiddish by Rosaline Dukalsky Schwartz
"The Scum", a derogatory nickname for British tabloid The Sun (United Kingdom) primarily used by those in the Liverpool area after its misreporting of the Hillsborough disaster.
Scum, a script by Roy Minton
- Scum (television play), a once banned television version (1977) directed by Alan Clark with Ray Winstone in a lead role
- Scum (film), a British feature film version (1979) of the above directed by Clark and with Winstone
- The SCUM Manifesto, a book by Valerie Solanas

SCUMM (Script Creation Utility for Maniac Mansion), scripting language for development of the graphical adventure game Maniac Mansion
SCUM Manifesto, a 1967 radical feminist manifesto wherein SCUM means "Society for Cutting Up Men"
Project SCUM, a cigarette marketing initiative
S.C.U.M. ("Saboteurs and Criminals United in Mayhem"), the criminal organisation from the animated series; James Bond Jr.