Толковый словарь английского языка Oxford English Reference - slub

1. n. & adj. --n. 1 a lump or thick place in yarn or thread. 2 fabric woven from thread etc. with slubs. --adj. (of material etc.) with an irregular appearance caused by uneven thickness of the warp. Etymology: 19th c.: orig. unkn. 2. n. & v. --n. wool slightly twisted in preparation for spinning. --v.tr. (slubbed, slubbing) twist (wool) in this way. Etymology: 18th c.: orig. unkn.