Webster’s Revised Unabridged Dictionary · 1913
Slubber
Slub′ber (·bẽr), 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.
Slub′ber, n. A slubbing machine.