Verb: slubber (third-person singular simple present slubbers, present participle slubbering, simple past and past participle slubbered)
To do hastily, imperfectly, or sloppily. To daub; to stain; to cover carelessly. To slobber.
Noun: slubber (plural slubbers). A person who, or a machine which slubs.
References: Oxford English Dictionary, 2nd ed., 1989. Random House Webster’s Unabridged Electronic Dictionary, 1987-1996.
Act I. Sc. iii. TRAGEDY OF OTHELLO.
place is best known to you; and though we have there a substitute of most allowed sufficiency, yet opinion, a sovereign mistress of effects, throws a more safer voice on you: you must therefore be content to slubber the gloss of your new fortunes with this more stubborn and boisterous expedition.
Bard. Yea, and to tickle our noses with spear-grass
to make them bleed, and then to beslubber our 330 garments with it and swear it was the blood of true men. I did that I did not this seven year before, I blushed to hear his monstrous devices.
ACT II SCENE VIII, THE MERCHANT OF VENICE.
Salarino. A kinder gentleman treads not the earth. I saw Bassanio and Antonio part: Bassanio told him he would make some speed of his return: he answer’d, ‘Do not so; Slubber not business for my sake, Bassanio.
Check it out: 31 entries of ‘slubber’ in ‘The Masters words’ at: http://www.shakespeare-online.com/.search?query=slubber&hits=10&offset=10&use_ysp