It comes to the Dundrum Town Centre retail complex, where its main channel runs along one side, while an old millrace feeds a former mill pond now a feature within the shopping facility.

The Slang then runs north via Windy Arbour and after a couple of culverted sections, joins the River Dodder at Milltown, near the Nine Arches viaduct, now used by the Luas.

Its name is from the archaic English term slang, meaning "long, narrow piece of land.

[3] According to the local authorities and the Office of Public Works, the Slang has a notable record of flooding.

[3] On October 24 2011, after torrential rain on "the Three Rock", the Slang burst its banks at the mill pond below the old castle, flooding the "Town Centre" shopping mall to a depth of at least 15 cm - a 'once in a century' occurrence according to reports, featuring in video reports on YouTube and similar sites and causing extensive damage in multiple shops and food outlets.