waterworks n.自来水厂；（人体的）泌尿系统。
turn on the waterworks（尤指过分、不必要或假惺惺地）哭起来。

【例句】
The doctor asked if I'd had any problems with my waterworks.
医生问我的泌尿系统是否有问题。

You can turn on the waterworks all you want - I'm not going to change my mind!
你想哭就哭吧——我是不会改变主意的！