Green’s Dictionary of Slang

1. (S. Afr.) a fool, an idiot, an unpleasant person.

1964		A. La Guma Threefold Cord 93: The burg’s mos got a car.
1980		A. Dangor ‘Waiting for Leila’ in Mutloatse Forced Landing 162: Go [...] we’ll handle this burg.

2. (also burgie) a person, a fellow.

1974		J. Matthews The Park and Other Stories (1983) 22: De burgie who puss [sell drugs] issa ou chommiel.
1980		A. Dangor ‘Waiting for Leila’ in Waiting for Leila (2001) 24: He is a blerry hond. Listen, Calypso, this burgie is trouble.
1983		J. Matthews The Park and Other Stories (2nd edn) 43: All yer burgs can come by forra meal.