A mythical creature used to distract others while in a conversation when you lose your train of thought. Derived from Pixar's movie "up" in which a squirrel distracts the dogs but never appears in the movie.
Example with no SQUIRL!:
So I was talking to him and he..... what was I saying?
Example with SQUIRL!:
So I was talking to him and he, SQUIRL!.... said he was going to get food.