look at what the cat dragged in

Look at what the cat dragged in is a phrase commonly used as a good humored and familiar way of showing surprise at someones presence when you werent expecting to see them. It is most often used when this person who has appeared looks a little bit rumpled, such as if a cat dragged something in like an old toy or even a rodent. It is usually spoken with good humor and slightly sarcastic at the surprise of seeing this person they really did not expect.