1. [late 19C–1930s] (US) a whisky-flask.
2. [late 19C–1940s] (US) a container, usu. a covered pail with a carrying handle, in which beer is purchased at a tavern, then brought home for consumption; thus growler money, growler boy, growler bag.
3. [1920s–50s] (US prison) any form of container, used for coffee, conveying illicit homebrewed alcohol etc.
[late 19C] (US) a tavern that sells beer to be taken of the premises.
[late 19C+] (US) to buy beer from a tavern and bring it home for drinking there; thus growler-rusher, n. andgrowler-rushing n. and adj.