1. noun
a) Abbreviation of cockatoo, especially when talking to such a bird, as in "hello cocky".
2005: Visit the local store at Coles Bay and youre greeted by a talking cocky called Jim. — , The World Today program, Town seeks environmental accreditation, 5 August 2005 [
b) A farmer, particularly a small-time farmer.
And stories in the bush may not seem relevant in the big smoke, but try telling that to a cocky. — Shelley Horton, Media Dimensions program, episode 15 [
2. adjective
Overly self-confident and boastful.
Wikipedia foundation.