As a Noun: 1. A tuft of feathers on the top of a bird's head. English = crest. 2. A kind of parrot that has a crest on its head. English = cockatoo. 3. The red growth that a cock (rooster) has on its head. English = cockscomb. 4. A young person who dresses in a very noticeable and unconventional way, for example by having brightly coloured or spiked hair and wearing metal chains. English = punk. Note: 1. The movement may also go in the opposite direction (from the front of the head to the back of the head) without any change in meaning.