Source : Webster's Revised Unabridged Dictionary (1913)

Slubber \Slub"ber\, v. t. [imp. & p. p. {Slubbered}; p. pr. &
   vb. n. {Slubbering}.] [Cf. Dan. slubbreto swallow, to sup up,
   D. slobberen to lap, to slabber. Cf. {Slabber}.]
   1. To do lazily, imperfectly, or coarsely.

            Slubber not business for my sake.     --Shak.

   2. To daub; to stain; to cover carelessly.

            There is no art that hath more . . . slubbered with
            aphorisming pedantry than the art of policy.
                                                  --Milton.