Added 9 October 2026 slub /slʌb/ noun Categories: Describing WordsObscure Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about slub at Wordnik → Where our words come from → A small thickened portion or knot found in yarn, caused by defects or uneven spinning. Fabric fiber produced by slubbing. verb To draw and twist fibers in order to prepare them for spinning. Related Words: knotburlslubbingssleaveknubscobslipslashslitchsluesclaff Back to today's word