n.
the reservoir from which Melbourneobtains its water supply: hence commonly used for water fromthe tap.
1871. Dogberry Dingo, `Australian Rhymes and jingles,' p. 8:
«O horror! What is this I find?
The Yan Yean is turned off.»
·vt & ·vi To bring forth young, as a goat or a sheep; to <<Ean>>. ...
Webster's Dictionary of the English Language