OK, I don't know where I've been, but I had never heard the above term until Wednesday when I was listening to Rob Walch's talk on podcasting. But I love it.
Walch is president of podCast411, Inc. He was speaking at the Newspaper Association of America's CONNECTIONS Conference in Orlando.
He's written "Podcasting for Dummies."
The Urban Dictionary defines "Flashing 12's pretty much the same way as Rob did:
A “Flashing 12” is a person with no technical inclinations' inept in all things technological. The name comes from the fact that when you walk into their house their VCR is Flashing 12:00, because they can not figure out how to program it.
Maybe I need "Slag for Dummies."