Chook

an Australian term for chicken that has been used in the US for chickens in a small flock
Found on http://afspoultry.ca.uky.edu/extension-glossary

Chook

Chicken.
Found on http://www.translationdirectory.com/glossaries/glossary026.htm

Chook

Chook was British military slang for powdered eggs.
Found on http://www.probertencyclopaedia.com/browse/ZC.HTM
No exact match found