Gong farmer
Gong farmer (also gongfermor, gongfermour, gong-fayer, gong-fower or gong scourer) was a term that entered use in Tudor England to describe someone who dug out and removed human excrement from privies and cesspits. As the work was considered unclean and off-putting to the public, gong farmers were only allowed to work at night, hence they were sometimes known as nightmen.