Green’s Dictionary of Slang

1. to put a jinx on.

1928		Mail (Adelaide) 24 Mar. 30/4: ‘Our luck is so rotten,’ said Bob, ‘that I think you should have nothing to do with us. We might put the “moz” on you’.
1975		Canberra Times (ACT) 24 Dec. 2/2: In retrospect, this might have been regarded as putting the moz on Gough, in the argot of my Melbourne schooldays, or in the current Americanism, hexing him.
1984		Partridge DSUE (8th edn) 760/1: since ca. 1920.

2. to hinder, to interrupt.

1941

Baker Popular Dict. Aus. Sl. 47: Moz, to interrupt, to hinder. ‘Put the moz on someone’, to inconvenience a person. Mozzle, to, as for ‘moz’.