Green’s Dictionary of Slang

1. (also gamaat, gammat) the stereotypical Cape Malay, esp. as the subject of jokes.

c.1949		H.C. Bosman Willemsdorp (1981) I 509: From his name, Josias, you would be more inclined to classify him as a Cape Gamat.
1955		A. Delius Young Traveller 99: Scattered about [...] were smaller, flat-roofed, two-roomed dwellings [which] belonged to the Kleurlinge, Gamats or ‘Hotnots’, as the coloured farm labourers were variously known [DSAE].
1971		J. McClure Steam Pig (1973) 216: How come a brother murders his own sister. Even for a gamaat, that’s pretty low.
1980		A. Dangor ‘Waiting for Leila’ in Mutloatse Forced Landing 161: Gamat! You have become Neptune’s tenant. Pay your rent.
2005		A. Lovejoy Acid Alex 103: Oh God no, sis! They all speak like gammats.

2. a Muslim boy .

1977		M. Tholo 3 Sept. in Hermer Diary of Maria Tholo (2001) 41: You know these stupid gamats.
1980		A. Dangor ‘Waiting for Leila’ Waiting for Leila (2001) 65: Gamat die Arapie, his treasure of sandwiches safely tucked beneath his arm.