Entry 2 senses · 2 variants Webster, 1913 Slub · IPA /slʌb/ n. v. t. 01 n. A roll of wool slightly twisted; a rove; -- called also slubbing. 1. A roll of wool slightly twisted; a rove; -- called also slubbing. Also: slubbing 02 v. t. To draw out and twist slightly; -- said of slivers of wool. imp. & p. p. Slubbed; p. pr. & vb. n. Slubbing 1. To draw out and twist slightly; -- said of slivers of wool.