a cat nap – a short sleep during the day – egy kis szundi
I’m so tired, I have to take a cat nap.

a cat on a hot tin roof – full of liveliness – macska a forró bádogtetőn (nagyon izgága)
Robbie was like a cat on a hot tin roof, the teacher couldn’t make him be quiet.

a copycat – somebody who copies another person – “utánozós majom”
Sarah is such a copycat! If I change my hairstyle she does the same immediately.

curiosity killed the cat – being too nosy may lead a person into trouble – “aki kíváncsi, hamar megöregszik”
Don’t go in! Don’t forget, curiosity killed the cat.

to fight like cats and dogs – we use this when people (who generally know each other) fight too much – kutya-macska harc (civakodás)
The two brothers fight like cats and dogs about everything!

to let the cat out of the bag – to tell a secret to someone – elárulni/elkotyogni egy titkot
Don’t tell this to anybody! Please, don’t let the cat out of the bag.

to look like a cat that swallowed a canary – to look very self-satisfied – nagyon elégedett magával
Mike looks like a cat that swallowed a canary! Did he pass the exam?

rain cats and dogs – rain heavily – “esik, mintha dézsából öntenék”
It’s raining cats and dogs! Let’s run home!