Adding a serious response in case [0] it's a serious question: "0wn" is a kind of in-joke among hacker/security communities. [1] In particular, it differs from "own" in that it connotes "forcibly taking control of", rather than formal legal ownership. Another version is "pwn" which is a marginally newer and more-associated with online gaming.
> "0wn" is a kind of in-joke among hacker/security communities.
In my experience, the security community says "pop".