I might have been the one to start saying "Hidey Hole",
I remember saying it to ChrisH when she first got Ebby home and she kept hiding.
We do use the term here for some of Samantha's hiding places as well as her "Kitty Caves".
We need to get Tuxluvr to post in this thread, she always has the greatest ones like "fur vending machine" and "liquid kitty spilled on the floor".