Green’s Dictionary of Slang

gonee n.

[ety. unknown; poss. linked to a tsotsi stereotype of members of the Angoni tribe of Nyasaland]

(S.Afr.) a knife.

[SA]Sophiatown in M. Orkin At the Junction (1995) 148: There’s a guard but it’s cool, it’s okay. I jump out. [...] I feel for my gonee – it’s there.