Green’s Dictionary of Slang

chook n.

[SE chicken]
(usu. Aus./N.Z.)

1. [late 19C+] (also chook-a-loo, chook-chook, chookey-hen, chookie, chucky) a chicken.

2. [late 19C+] a woman.

3. [1950s+] (N.Z.) a fool.

4. see bush chook under bush n.1

In compounds

chook’s bum (n.) [bum n.1 (1)]

[1980s] (N.Z.) the mouth.

In phrases

may your chooks turn into emus and kick your shithouse down (also …and kick your dunny (door) down)

[1960s+] (Aus.) used to convey one’s extreme annoyance with another’s actions or words.