Source : Webster's Revised Unabridged Dictionary (1913)

Scummer \Scum"mer\, v. i.
   To scumber. [Obs.] --Holland.

Scummer \Scum"mer\, n.
   Excrement; scumber. [Obs.]

Scummer \Scum"mer\, n. [Cf. OF. escumoire, F. ['e]cumoire. See
   {Scum}, and cf. {Skimmer}.]
   An instrument for taking off scum; a skimmer.