Green’s Dictionary of Slang

broken arse n.

[arse n. (1)]

(N.Z. prison) a prisoner who has failed to deal emotionally with the pressure of prison life; thus relegated to the bottom of the inmate hierarchy.

[NZ]G. Newbold Big Huey 59: If the others knew the way I was feeling they’d call me ‘broken arse’.
[NZ]B. Stewart Broken Arse II vii: whimple: Hey, you’re a scab, man! You’ve sold out! [...] all: Broken arse, Broken arse, Broken arse.
[NZ]McGill Reed Dict. of N.Z. Sl. 34: broken-arse A prisoner who has caved in to the system and goes to the bottom of the pecking order among his fellow prisoners. 1980s.

In derivatives

broken arsed (adj.)

(N.Z. prison) characteristic of an emotional weakling.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 31/1: broken arsed adj. being a broken arse, displaying the characteristics and behaviour of a broken arse.

In phrases

broken arse fever (n.)

(N.Z. prison) increased nervous as one’s release date nears.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 30/2: broken arse fever [...] ridiculing the inmate for being nervous in the days leading up to his release date.
broken arse way, the (n.)

(N.Z. prison) usu. in context of dealing with one’s sentence: showing oneself to be lacking in courage, competence or emotional stability.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 30/2: do something the broken arse way to do something in a way that suggests a marked lack of courage, competence, or emotional control. This is most frequently applied to one’s sentence, i.e. do one’s lag the broken arse way.