Newb, by definition, a player who knows little about the game or how to play it in some aspects, and often requires help to figure it out.
We've all meet newbs before, players who ask things that have become so massively obvious to us that it surprises us they have to ask it, but sometimes, once in a while, we meet a player who is such a massive newb, that it leaves it marks on your subconscious how.
I meet such a player recently well on an archaeology dig run (yeah I was that bored), when flying down to the un'goro cretor, I flew down and saw a lv50 undead warrior running around well I dug, to which he came over to me, said Hi, and I gave him a friendly wave.
What proceeded was the newbfest 2012. He asked me where i got my mount from, where can he get one, can i help him do quests because I'm much higher level, can I give him money because I'm higher level so must have lots, where can he get nice gear like I was wearing, how can he level faster, can I show him where to level next, can he add me to friends or real id because I was friendly, what spec should warrior be and whats more fun..
This went on for 5 minutes until I was banging my head on the desk realizing either this guy was one massive newb or one massive troll, but I guessed the latter since he didn't have any heirloom hear on. I tried to answer some of his questions but he just kept popping more. Eventually, since I don't have the heart to ignore someone like this, I fake dced, and played on an alt until the moment passed.
So, what has been your encounter with serious newbs in wow, ever meet any that made to ask 'how the hell did this person figure out how to play this game in the first place?'