Scrub1  —v. (-bb-) 1 clean by rubbing, esp. With a hard brush and water. 2 (often foll. By up) (of a surgeon etc.) Clean and disinfect the hands and arms before operating. 3 colloq. Scrap or cancel. 4 use water to remove impurities from (gases etc.). —n. Scrubbing or being scrubbed. [low german or dutch]