Green’s Dictionary of Slang

(S.Afr. township) a bootlegger.

1971		Daily Dispatch (S.Afr.) 2 Oct. 12 : The ‘gweva’ (go-between) was the mainstay for supplies to shebeens and with the strict application of prohibition laws the existence of both gwevas and shebeens was understandable [DSAE].
1977		Casey ‘Kid’ Motsisi ‘Confessions of an Illicit Boozer’ Casey and Co. (1978) 64: The decree was one ill wind that knocked the enterprising old gweva out of business. Still remember the old gweva? Hanging around [...] corners near grog shops always ready to do business.
1993		M. Ki Harvey in Weekly Mail 23 Dec. 15: When the case is finished, it’s back to the bottlestore or the local gweva (bootlegger) for the next one [DSAE].