1. [mid–late 19C] (Aus.) Australian-distilled, dark, very strong brandy [the dark red colour].
2. [mid-19C+] (US) a derog. term for a black person [abbr. darkie n. (1)/SE dark].
3. [late 19C–1900s] (Aus./US prison) solitary confinement in a dark cell.
4. [1910s] (Aus.) a nickname for those with dark hair or complexion.
5. [1960s] (US campus) a fool, a dullard [dark adj. (1)].
6. [1980s+] (Aus. prison) tobacco [the dark red colour].
[late 19C+] (US) the black area of a town or city; also attrib.
SE in slang uses
1. [early–mid-18C] a nightwatchman.
2. see darkmans n. (1)
[late 19C–1940s] (US) of coffee, black.
[1930s–40s] (US black) a very dark night, with neither moon nor stars.