Webster's Revised Unabridged Dictionary · 1913

Slubber

Slubber , transitive verb

[Compare Danish slubbreto swallow, to sup up, Dutch slobberen to lap, to slabber. Compare Slabber.]

1.
To do lazily, imperfectly, or coarsely.
Slubber not business for my sake. — Shakespeare
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

Slubber , noun

A slubbing machine.