Green’s Dictionary of Slang

(S.Afr.) a marijuana smoker; also as v.

1949		H.C. Bosman Cold Stone Jug (1981) II 28: The dagga-cigarette is now ready (the ‘zol’, they call it) and the rokers gather round in a circle.
1974		H. Levin Bandiet 119: It was impossible to gauge how many boom-rokers/boom smokers there were at the Central but [...] my impression was that a fairly large percentage of the bandiete were ‘rokers’.
1977		(con. 1930s) G. Butler Karoo Morning 99: Rookers’ Hoek, the illicit smokers’ site.
1982		P. Slabolepszy Sat. Night at the Palace (1985) 59: When I met him he was a bigger rooker than I was!
1986		P. Slabolepszy ‘Boo to the Moon’ in Mooi Street (1994) 135: You been sniffing tonight? You been rooking.
1990		J. Naidoo Coolie Location 26: There was this dagga-rooker, Thomas.
2005		A. Lovejoy Acid Alex xiv: Rasta Paulus and every single other boom-roeker in the Bos. [Ibid.] 60: I’m going to tune you something hectic and you might lag, [laugh] [...] you are going to turn into a regte ou-roeker.