x0rz is a suffix of words or names.

For instance:

Ann --> annx0rz
Habbo --> habbx0rz
AIM --> aimx0rz
fuck --> fux0rz
suck --> sux0rz
rock --> rox0rz

and so on. Other letters can be replaced into 1337, 1F j00 |/\|15|-|.