"Chatty Cathy"

Does anyone use the phrase "Chatty Cathy?"

Last week I began teaching a class in constitutional law at a local high school. The students are engaging -- sometimes a bit too engaging! Today after leaving the school I told my teaching partner that our room was filled with a bunch of "Chatty Cathies."

I use this phrase frequently, but realized today that I had no idea where I had picked it up. So I did some internet research, and to my great surprise, the first 4 Google pages (I couldn't be bothered to continue searching after that) didn't even mention using "Chatty Cathy" in the way I so often use the phrase. Not even Wikipedia mentioned using Chatty Cathy to describe someone who is a bit verbose.

No -- Chatty Cathy is apparently just a doll produced by the Mattel corporation in 1959 who spoke 11 phrases when you pulled the string in the center of her back.

So if Wikipedia doesn't report on it, does that mean that this hasn't even risen to the level of slang? Other people use it -- I know they do. So is it too new, or too old, to surface onto main pages of the internet?