In college, we had a computer security class. We formed a 5 man group of "hackers", and the rest of the class was security. Kind of a real world exmaple of networking. To keep it true to life, each "hacker" was given a call sign so when we were successful at an intrusion, we would mark it with our call sign to identify ourself to the security team so they could ask us questions about how we did it. I was dubbed "cexshun" by my peers, referencing my favorite techniques to employ. It's basically just a crazy way to spell "section". I guess it just stuck because I thought it sounded cool.