To be more specific in real-world terms, Amblepaw is a wobbly cat!

She has cerebellar hypoplasia. The part of her brain related to motor skills didn't develop properly, so she moves and speaks a bit differently than other cats.

In real life, our own boy Apollo-- while not a CH cat-- was hit in the head at some point before we got him.

You can see how his nose is skewed from it! It's also damaged his brain in a way that causes (among other things) similar symptoms to a mild case of CH, mainly appearing in the way he runs.