A bit of quick vocab that's eay to absorb and will make newbies feel less amateur!
Blog: a contraction of the words web and log.
Blogosphere: The universe of blogs. You can also talk about cooking, fashion, music and gay blogospheres to refer to blogs on a certain theme.
Blogger: You guessed it: the author of a blog.
Bloglist: A list of links to other blogs.
Comments: Comments to the author's posts from visitors.
Post: Usually a short piece of text, with photos, music or videos, posted by the author. Note that posts appear in reverse order: the latest appears first at the top of the page.
RSS (Really Simple Syndication): A system which lets bloggers display a feed of information from other blogs - with the author's permission, of course!
Troll: An nasty piece of work who gets their kicks from arguing and being vile to others on blogs and forums.