New Words In Our World

My dictionary is must be old.  It was published in 2001 (is that really old?) and there are words I can't find in it.  I looked for the word blog.  Not there.  So what does it really mean?  How about the word Twitter?  Not there either nor is facebook.  Try skype.  Humm.  If you don't believe our world is changing just go to your dictionary. Now let's start a contest to see how many new words a person can find.  How about you?  What are some new words that you see and use from time to time. Send them to me and let's see how many we can think of. We'll make a list and see what we can come up with.  OK?