Green’s Dictionary of Slang

doris adj.

[var. dora n. (1)]
(S.Afr. gay)

1. drunk.

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PAN (Copenhagen) Feb. 5/4: Politi er ‘Jennifer Justice’ eller ‘Priscilla’, ‘Doris’ betyder fuld, ‘Nora’—dum. [The police are ‘Jennifer Justice’ or ‘Priscilla’, ‘Doris’ means drunk, ‘Nora’—stupid.] [Simes:DLSS].
Gevisser & Cameron Defiant Desire 221: Doris, a drink [Simes:DLSS].

2. mad; eccentric [? initial letter of daft].

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Gevisser & Cameron Defiant Desire 221: Doris [...] dreadful [Simes:DLSS].
[SA]K. Cage Gayle.