Green’s Dictionary of Slang

1. (S.Afr.) to smoke a (marijuana) cigarette.

1971

Cape Times Mag. 3 July 4: Boon makes us a lekker zol of B.B. tobacco [...] and we skuif it down to a slimy half-inch butt [DSAE].

2. to smoke.

1977		D. Muller Whitey 16: The shaven heads were thrust forward. ‘Skyf’, they said, ‘Smoke!’.
1991		Informant in DSAE (1996).