Mine is actually rather uninteresting. My name is Jon, and well when I made this sn, I had just decided to study engineering, so I just figured enginjon would be the logical choice. Since making it, my friends and I make fun of it, since it is so silly, but I can't come up with anything different. I use it for just about every application where a screenname is needed (ex. IM, ICQ, online gaming, etc.) I guess it has just stuck