A negative description of a rich and powerful person.
Those fat cats in government don't care about the poor.
Has the cat got your tongue? is an expression we say to people when we want them to speak but they aren't.
Tell me why you are late again. What's the matter, has the cat got your tongue?
Basically, being too curious can get you into trouble. It's used to warm someone they are asking too many questions.
Simon: Where did James suddenly get all that money from?
Sarah: Curiosity killed the cat, you know?
When some something has no chance of success, it doesn't have a cat in hell's chance.
We haven't got a cat in hell's chance of getting there before 5:30 with this traffic.
When someone looks very untidy and messy, they look like something the cat dragged in.
Go shower and get changed, you look like something the cat dragged in!
When you accidentally tell someone a secret, the cat is out of the bag.
I tried to keep my birthday a secret but my brother let the cat out of the bag.
-se-