ginger, v. — Green’s Dictionary of Slang

ginger v.

(Aus. und.)

1. of a prostitute, for a third party (? a pimp) to steal from a client while the sex is taking place.

1944		Truth (Sydney) 12 Mar. 9/1: Constable Munro announced that the women had been ‘gingering’ for a long time. But their victims seldom contacted the police as many were married men.
1950		‘No 35’ Argot in Simes DAUS.
1953		K. Tennant Joyful Condemned 5: ‘Gingering’, or robbing prospective clients, was considered low taste.
1961		X. Herbert Soldiers’ Women (1978) 261: ‘They’d like to do business with the gal who gingered Plug for his roll - yes, and who burgled Birdie’s flat!’.

2. to steal (from) the client's clothes while he is engaged in sex.

1944

Sun. Teleg. (Sydney) 9 Jan. 18/3: The men were represented by Solicitor Jack Thorn, who, after he’d heard the evidence against them, asked: ‘Isn’t this a case of a street woman alleging she’s been gingered herself’ [Simes:DLSS].

In derivatives

gingerer (n.) (also ginger girl)

a prostitute or her accomplice who steals from clients.

1944		Truth (Sydney) 12 Mar. 9: [headline] Gaol for ‘Gingerers’ [...] The prosecutor directed his remarks to ‘ginger’ girls generally [Simes:DLSS].
1950		in glossary Simes DAUS.
1961		V. Kelly Rugged Angel 193: Stella Croke [...] was one of the type who plied their trade on the streets more for the purpose of robbery than prostitution. They are known as ‘gingerers’ [Simes:DLSS].

gingering (n.)

the robbery of a prostitute’s customer while he is engaged with the prostitute.

1944		Dly Teleg. (Sydney) 15 May 6/5: There are quite a few of these places in Woolloomooloo. They combine sly-grog, robbery, and gingering (stealing from a man’s pocket) [Simes:DLSS].
1953		K. Tennant Tell Morning This 4: ‘Gingering’, or robbing prospective clients was considered low taste, but after all the man was a copper.
1961		V. Kelly Rugged Angel 193: When Hoffman struggled with the women to prevent the gingering, two men rushed in and assaulted him so seriously that he was knocked unconscious [Simes:DLSS].
1978		H.C. Baker I was Listening 18: Constable Munro announced that the women had been ‘gingering’ for a long time. But their victims seldom contacted the police as many were married men [Simes:DLSS].