We had a knocker-up, and our knocker-up had a knocker-up And our knocker-up’s knocker-up didn’t knock our knocker up So our knocker-up didn’t knock us up ‘Cos he’s not up. Source During the early days of the industrial revolution a certain practice lasted well into the 20th century. These were days before alarm clocks … More The knocker upper – waking workers up in the industrial age