Green’s Dictionary of Slang

(S.Afr. drugs) to smoke marijuana.

1963		L.F. Freed Crime in S. Afr. 105: When he says he ‘rooks the weed’ he means that he smokes dagga, and when he says that he is ‘bang the ore will take a jerry’, he intends to imply that he is afraid the police may find out.
1985		B. Simon ‘Outers’ Born in the RSA (1997) 53: Stop your drinking, stop your naaing, stop your rooking.
1986		P. Slabolepszy ‘Boo to the Moon’ in Mooi Street (1994) 135: You been sniffing tonight? You been rooking . . .