slubbing

Webster's Dictionary (GCIDE)

Slubbing \Slub"bing\, a. & n. from Slub. [1913 Webster]

Slubbing billy, or Slubbing machine, the machine by which slubs are formed. [1913 Webster]

Slub \Slub\, n. [Etymol. uncertain.] A roll of wool slightly twisted; a rove; -- called also slubbing. [1913 Webster]

Slub \Slub\, v. t. [imp. & p. p. Slubbed; p. pr. & vb. n. Slubbing.] To draw out and twist slightly; -- said of slivers of wool. [1913 Webster]