Gardyloo in British English (ˈɡɑːdɪˌluː) noun. archaic. a warning cry given before throwing dirty water from a window. Those living on the top floor of tenements would dispose of their urine by emptying the container into the street out of an open window, shouting ‘Gardyloo!’
Scottish – Tenements in Scotland’s capital during the 18th century could be as tall as 14 stories high and had no electricity, running water and or lavatories (inside or out). Toilets at that time were simply a bucket filled up during the day and it was the job – usually of the women and children – to empty them out. People living on the bottom floor of dwellings could walk outside and empty the contents onto the close, but for those ten, eleven, twelve floors up, opening the window and emptying chamber pots was a common occurrence, with a splash back reaching as far as the second floor.