fat cat
有钱有势的人
A fat cat refers to someone who is wealthy or powerful and typically works in business or politics.
在商界和政界有钱有势力的人

cat burglar
飞贼
A nimble, silent, sneaky thief.
一个敏捷，安静，狡猾的贼。

Scaredy-cat
胆小鬼
Someone frightened by almost everything
什么都害怕的人

Copycat
抄袭者
someone who copies someone else
喜欢抄袭别人的人
Guy1: "I shaved my head last week, and now this week he has shaved his!"
我上周刚剃完头，这周他就去剃头了。
Guy2: "He's such a copycat，it's so obvious he wants to be like you."
真是喜欢模仿别人，他就是想变的和你一样。

Curiosity killed the cat
好奇心害死猫