What is it?

What?  What is it?  What is what?  That's what I'm asking and, by the way, who's on first?  When?  He's on second ... I don't know ... third base!  So, I think I may have mixed up part of this but don't you just love this old routine by Abbott and Costello?  Seems kind of apropos with baseball season looming before us.  Baseball is not my concern right now though.  I am trying to figure out what exactly a blog is.  You see, I like words.  Alas, the word 'blog' is not included in my dictionary.  This means it is a new word.  Now new words can come about through various means and then are accepted as part of our language through common and widespread usage.  A word can be the name of a common product such as Kleenex.  Let's face it, very few people say they need to run to the store to buy some facial tissue.  Everyone says Kleenex whether one purchases this particular brand or the store brand or the generic version in the yellow package with the black lettering.  What about acronyms?  Does anyone have any good acronyms for BLOG?  How about Building Lots Of Gold?  Brief Letters Or Gabbing?  The truth is it is problably something very simple and I am making the whole process more complex than need be.  Words can also come about through combining other words.  I envisioned a blockheaded blond bloke accompanied by his blotchy-furred, yet faithful, bloated bloodhound blowing hot and cold as he alternately studied blemished blueprints and thought about the blithe maid attired in black bloomers and blue blouson.  Well, any of these words could prove to be the first half of the word but what about the second half?  We need words which end with 'og'.  Are you ready?  Here are a few:  agog, bog, cog, dog, fog, frog, hog, jog, log, nog, and tog.  I was surprised to find the dictionary did not include 'sog', but then it was not keen on the words 'pog,' 'wog' or 'zog' either.  Now what have we here?  The blond bloke is agog at the thought of the maid. His mind in a fog, he leads  his bloodhound dog searching for the blueprint's cog.  Tripping over the hog he thought was a log he challenges a frog for a place in the bog whereupon he tears his new togs.  Thowing up his hands he says "Forget it!" and heads home for a nog.  What?  It could happen. Well, as this is all a bit ridiculous and mind frazzling I settled on combining the words 'brief' + 'log'; hence, a 'blog'.  Nevertheless, blog is now a word.  If anyone knows the true derivatin of the word'blog' I would love to hear it.