1. The act of removing scum or foam from a liquid surface
   "Scumming is an important step in making clear broth"
    
2. (usually plural) the material removed by skimming; scum or foam
   "The scummings from the soup were discarded"

1. Remove the scum from
   "The cook scummed the broth before serving"

Derived forms: scummings

Type of: get rid of, remove

Encyclopedia: Scum