Green’s Dictionary of Slang

1. (UK Und.) to trick, to swindle.

1885

M. Davitt Leaves from a Prison Diary I 55: He boasted [...] of having ‘emptied’ a young Etonian of his gold watch and 20l.

2. (Aus. prison) to be transferred suddenly to another prison.

1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Empty. 2. To ‘shanghai’ a prisoner. Thus, ‘to be emptied’ is to be transferred suddenly to another prison. ‘To empty’ a gaol is to get rid of the troublemakers.
1993		Smith & Noble Neddy (1998) 306: He used to talk too much and always ended up getting himself, and whoever was in his company, emptied [transferred] to some other jail.

3. (Aus. Und.) to dismiss from a job.

1993

Smith & Noble Neddy (1998) 145: The only reason that he has agreed is because they have decided to empty him [throw him] out of the taskforce. He is filthy on them and wants to even up with them.