I read somewhere that cats have more facial muscles than we do, and consequently a wide range of facial expressions. (Was it Skeleton Men of Jupiter? I don’t remember.) But being human, we can’t accurately read most of those expressions.
But my cat Missy did have a particularly indignant expression that anyone could read. It was mostly for her brother, Buster. He ignored it at his peril.
If you’ve ever tried to sell a cat school supplies, you’ll know what I mean.