Green’s Dictionary of Slang

Mortie n.

[misreading or var. on Matie n. (1)]

(S.Afr.) a student at the University of Stellenbosch.

[SA]‘Rawbone Malong’ Ah Big Yaws? 25: An annual rugby match played between the Arkies and the Morties (students of the Universities of Cape Town and Stellenbosch, respectively).