Green’s Dictionary of Slang

1. (Aus. Und.) a robbery.

[1990		D. Heilbroner Rough Justice 208: [T]he only sensible decision was to charge the most serious illegal act: Robbery in the Second Degree [...] I read the statute for Rob 2 and left the [grand jury] room].
1993		Smith & Noble Neddy (1998) 133: The next day I saw a friend who I knew was into armed robs. I mentioned that I had a sweet go.
2012		D. Whish-Wilson ‘In Savage Freedom’ in Crime Factory: Hard Labour [ebook] They do the armed robs — three of them. Two servos and a late-night chemist.

2. (Aus.) the police armed robbery squad.

2020

D. Whish-Wilson Shore Leave 111: Gooch was a detective sergeant in armed rob.