There are 2 results of your search for cocky1.
cocky1
a lock of hair sticking up or out from the head, looking like part of a cockatoo's crest: 'Did you know you have a cocky?' and the person smoothes down their hair. (Prob obsolete now: used 1940s, 50s, 60s, but now (city) people think of 'cocky' as meaning cockroach.
Contributor's comments: Hair sticking up on head: They combed their hair, but missed a few cockies.