I did not have a chance to get into all the particulars of this thread, but wanted to mention another term I've begun to hear recently, which is "Boomer".
As you are probably aware, it is supposed to refer to baby boomers, ie. those born in a period of ~10-12years post WWII.
I've mostly heard it expressed with a tone of contempt (why?), but I am unclear on the connotations. So my reaction is usually to think "Huh? I wonder what on earth that is supposed to mean???"
I'm not quite a boomer, but someone who I have never met and do not know I think called me that on the internet, again my reaction is "Huh ? ? ? ? ".
But I can't work myself up about it enough to really care too much.