Green’s Dictionary of Slang

(S.Afr. gay) a drunkard, thus adj. drunk, v. to drink.

1972		B. Rodgers Queens’ Vernacular 92: Gail [sic] draws heavily on other girls’ names to stock its vocabulary: dora = a sot, wendy = a white, etc..
1989		S. Gray Born of Man 113: ‘Er, listen can I jus’ have another drink? Then I’m going…’ ‘Don’t dora your way out of this,’ I said [Simes:DLSS].
1994		Gevisser & Cameron Defiant Desire 202: Whether one has too many doras, or doras heavily, the end result of becoming or being dora’d is the same [Simes:DLSS].
2003		K. Cage Gayle 66/2: Dora adj. drunk • n. 1. alcoholic drink [Western Cape] 2. alcoholic person • v. drink alcohol. Dora belle adj. very drunk. [...] Dorette n. small drink, a shot.