issue, n. — Green’s Dictionary of Slang

issue n.

(Aus.) everything, the lot, all there is.

1924		(con. WWI) A.G. Pretty Gloss. of Sl. [...] in the A.I.F. 1921–1924 (rev. t/s) n.p.: issue. A portion; ‘to go one’s issue’ – to be killed; to get the whole issue of a shell, to be struck bodily by a shell.
1936		J. Curtis Gilt Kid 87: ‘Yes, sir?’ asked the barber. ‘The issue. Hair cut, shave, shampoo, friction, vibro, face massage, head massage.’.
1941		Baker Popular Dict. Aus. Sl. 38: Issue, all, everything, the lot.

In phrases

get one’s issue (phr.)

(Aus.) to be killed.

1932

(con. WWI) L. Mann Flesh in Armour 77: ‘Jack Martin’s got his issue.’ [...] Charl’s eyes [...] saw a dark thing with a white blob at the end of it stretched out on the ground.

the whole issue (n.)

(Aus.) everything, the lot, all there is.

1924		(con. WWI) A.G. Pretty Gloss. of Sl. [...] in the A.I.F. 1921–1924 (rev. t/s) n.p.: issue. A portion; ‘to go one’s issue’ – to be killed; to get the whole issue of a shell, to be struck bodily by a shell.
1956		J. Curtis Look Long Upon a Monkey 149: It’s the bloody lot for me — the whole issue.