Green’s Dictionary of Slang

(S.Afr.) energy, power.

1971		Rand Daily Mail (Supplement) 6 Mar. [advert] Woema! Let your car come alive ... It’ll save you money. And at the same time give you something really new. Woema! [DSAE].
1987		City Press 25 Oct. 24: New Ford Laser has added woema [DSAE].