Green’s Dictionary of Slang

(orig. S.Afr.) an exceptionally well-regarded variety of marijuana, grown near Durban, Natal.

1969		personal recollection.
1974		J. Matthews The Park and Other Stories (1983) 20: Firs’ class stuff. Jus’ like Durban poison.
1986		R.G. Barrett Real Thing 143: me and a mate cross-bred these plants with seeds from ‘Durban Poison’ and ‘Thai Buddha’.
1997		N. Barlay Curvy Lovebox 33: What happen to [...] de lunatic Durban or dat sticky fokkin orange skunk.
2004		Observer Mag. 13 June 51: Durban Poison. Despite the fearsome name, this is a relatively mild, pure sativa from South Africa.