• IPA: /ˈslʌbə(ɹ)/

slubber (slubbers, present participle slubbering; past and past participle slubbered)

1. To do hastily, imperfectly, or sloppily.
   • c. 1596–1598, William Shakespeare, “The Merchant of Venice”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358 ↗, [Act II, scene viii], page 171 ↗:

     {...}} he [Antonio] answered, do not so, / Slubber not business for my sake, Bassanio, / But stay the very riping of the time

2. To daub; to stain; to cover carelessly.
   • 1641, John Milton, Of Reformation Touching Church-Discipline in England: And the Cavvses that hitherto have hindred it., Printed, for Thomas Underhill; republished as Will Taliaferro Hale, editor, Of Reformation Touching Church-Discipline in England (Yale Studies in English; LIV), New Haven: Yale University Press, 1916, OCLC 260112239 ↗:

     There is no art that hath more […] slubbered with aphorisming pedantry than the art of policy.

3. To slobber.

slubber (plural slubbers)

1. A person who, or a machine which, slubs.