1. with reference to silver money.
(a) [early 19C] (UK Und.) a counterfeit shilling.
(b) [late 19C+] (Aus.) a shilling.
2. with ref. to intoxicating drinks.
(a) [19C–1920s] gin.
(b) [1930s] (US) any form of alcohol.
(c) [1950s] (Aus.) methylated spirits.
3. with ref. to the colour of various drugs.
(a) [20C+] morphine, heroin.
(b) [1930s+] (orig. UK Und.) cocaine.
(c) [1960s+] amphetamine.
(d) [1980s+] crack cocaine; also attrib.
4. (US) a white-wall tyre.
SE in slang uses
[1950s] (Aus.) to succeed.