Green’s Dictionary of Slang

(S.Afr.) a sandwich.

1972		‘Rawbone Malong’ Ah Big Yaws? 64: Sarmie, Sam, Sammits. These are only some of the S[ow] T[thaffricun] I[nnglissh] variants.
1985		B. Simon ‘Outers’ Born in the RSA (1997) 39: Do you want a sarmie? [Ibid.] 41: I was eating a sarmy.
1996		CyberBraai Lex. at www.matriots.com 🌐 SARMIE: This is a sandwich and in some parts of the country kids also know it as a ‘zonk.’.
2005		A. Lovejoy Acid Alex 206: I’ve been to the bomb for three weeks for being caught with sarmies that a Welfare worker threw away in a bin.