MV Gardyloo was a specially designed sewage dumping vessel that operated from Leith, the port of Edinburgh, between 1978 and 1998. Prior to 1978, the city of Edinburgh's waste was discharged into the Forth from a series of eight outlets along the coastline, where it often washed back up on beaches and rocks. The vessel took her name from the word "gardyloo", which was historically used by the burghers of Edinburgh to warn passersby that they were about to dump waste water into the street below.