Green’s Dictionary of Slang

1. to deceive, to defraud, to hoax.

1907		Sun. Times (Perth) 4 Aug. 4/8: I’ve rorted in railway camps / [...] / I’ve worked sweet racing ramps.
1907		Sun. Times (Perth) 29 Dec. 1/1: Perth is infested with spielers [and] having ‘wroughted’ large numbers of yokels, they have the argot of the toiler.
1938		J. Curtis They Drive by Night 150: Carrying on and rorting like that.
1953		S. Baker Aus. Speaks 134: A trick, a cunningly devised plan; rarely used as an intransitive verb, when it means to live by rorting.
1982		G. Newbold Big Huey 256: wrought (v) Trick, conspire, swindle.
1985		Senate Wkly Hansard (Aus. Parlt) 570/1: I think Senator Missen suggested that people are, if I might use the vernacular, rorting the system.
1997		L. Davies Candy 247: As a drug addict the days had always been fairly predictable: rort, scam, get the dope.
2001		(con. 1945–6) P. Doyle Devil’s Jump (2008) 72: You want me to admit to rorting you? What kind of mug do you think I am?
2016		D. Whish-Wilson Old Scores [ebook] The guards ran their own race [...] rorting the overtime system and some of the commerce inside.

2. to manipulate ballots or any form of record, to rig.

1980		National Times (Sydney) 27 July 3/1 n.p.: The ‘rorting’, as it is called, of branch books to influence the selection of local, State and Federal candidates [AND].
1996		(con. 1950s) in P. Doyle Get Rich Quick (2004) 23: He rorted an army commission for himself.