Green’s Dictionary of Slang

1. (N.Z. prison) a potential victim of crime.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 124/1: nine-one-one (also 911) n. 1 a potential victim, esp. of a theft .

2. (N.Z. prison) one who summons the police in various circumstances.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 124/1: nine-one-one (also 911) n. 2 an inmate who calls for help from prison 3 (on the outside) one who rings for police assistance if harassed by criminals.