My friends Turkish (kurdish)boyfriend refers to himself Za Za, his family originate from just inside Iraq, he comes from south eastern anatolia Sanliurfa way is where his family is based now. I recall someone saying it is something similar along the lines of Liverpudlians being referred to as scousers.
I have an iraqi friend I will ask him what it really means.
A good site to visit if you have not already been is Loved by Turkish Hotel Boys, you can read all about Altinkum boys there but also I do recommend you read the other turkish links too.