What is Waterworks?
Waterworks is (noun) buildings with pumps for pumping water to houses and factories This red brick building is the waterworks for the whole area. to turn on the waterworks to start to cry because you want sympathy (informal.) She just has to turn on the waterworks and her mother always gives in. (plural noun) the urinary system, the system for passing urine (informal.) The doctor says there’s nothing wrong with his waterworks.
source: Easier English, Student Dictionary Upper Intermediate Level