Green’s Dictionary of Slang

1. (Aus.) a reply, a retort.

1944

L. Glassop We Were the Rats 212: ‘You had a go-back?’ I asked. ‘You didn’t let him get away with it?’.

2. (US Und.) a second (or subsequent) attempt at the same crime.

1937

(con. 1905–25) E.H. Sutherland Professional Thief (1956) 80: The muzzle is one of the few rackets in which a go-back (a second attempt) can be successfully staged. In some instances two or three go-backs on the same man are successful.