What does “squirrel” mean? I’m hearing that a lot these days and I don’t understand it. Can you explain. Thanks!
It’s a reference to distractions - when a dog sees a squirrel, they suddenly forget everything and focus intently.
It was in the Disney movie “Up”. Here is just one of the scenes in the movie with this reference. :^)
http://www.youtube.com/watch?v=xrAIGLkSMls
Mortman has explained it well, but I'll add: I believe the origin is the movie: "Up!".
Here's an example: http://www.youtube.com/watch?v=OxYYPziLdR4