I'm at work. I just spent 2+ hours in a meeting about web site design, navigation and so forth. I have to say I love knowing the lingo of these groups -- sub-nav, spider the site, there are so many, way too many to list. What fascinates me is the little buzz I get when they use a lingo-kind of phrase and I understand it but know it's nothing that I would ever use myself. It's that little bit of special knowledge for an "in" crowd.
Again, probably says something about my ego.