I'd never heard this term before it popped up on on the list of stuff that's hot on google today.

Sara and I were planning out our holiday shopping for friends and family last night, and will likely do a great bit of it online in the next few weeks.

Yes, I have heard of CyberMonday in the past, but it is not valid.
It seems to me that by inserting this term into what is hot on google(before Thanksgiving), someone or some group is hoping to spread the idea virally...which is OK. Will it work? That will be interesting to determine after the holiday online shopping statistics are determined. Maybe we will see more information;D