Entry 3 senses · 3 variants Webster, 1913 Scummer · Scum·mer · IPA v. i. n. n. 01 v. i. To scumber. 1. To scumber.[Obs.] 02 n. Excrement; scumber. 1. Excrement; scumber.[Obs.] 03 n. An instrument for taking off scum; a skimmer. 1. An instrument for taking off scum; a skimmer.