- noun a device for removing sulfur and other pollutants from waste gases
- noun a coarse, vulgar and/or promiscuous female. This now common term was first heard in the 1920s. ‘Scrub’ had been used to mean a shabby or seedy person or a prostitute since the 18th century. Scrubber, like ‘scrub’, derives from the notion of having to scrape and forage for food or money, rather than to scrub floors, etc.