Azns are young, try-hard Asians striving as hard as they fucking can to escape their cultural and genetic heritage. Azn's are massively "pRoUd" of being Asian - which is why they mimic the culture of others like blacks and whites. This can be seen in their anime where almost every single character is blond-haired, blue-eyed, and tall, or when they try to rap out their "azn pride".
Ultimately, this ends in epic fail and generates lots of lulz for Westerners to see. Azn's are the suburban Michael Jacksons of our time, deeply ill-at-ease with themselves, with many resorting to plastic surgery to upgrade (caucasiaplasty).
'Azns' are not to be confused with 'normal' Asians. Azns are young, formerly 'Asians' who have come into contact with, or who gain a general awareness of, other races. This process triggers a change in the Asian, who begins to feel inadequate at the fact they can be blindfolded with dental floss, among other things. They must then become "Azn" to gain a semblance of self-esteem.
This process is especially profound in Asians living in the West, and especially amongst young Asian males. Asian girls have far less reason to mutate into an "Azn", and especially because they know they'll be having have white babies.