smell a rat 覺得可疑
I smelt a rat when he started being so helpful!
the rat race 激烈的競爭
Living in a big city is one big rat race.
play cat and mouse with sb. 欲擒故縱，(像貓抓耗子似地)欺負(折磨、虐待)某人
The policeman decided to play cat and mouse when he saw the woman steal the dress in the store.
a bull in a china shop 經常闖禍的人，笨手笨腳的人
He‘s like a bull in a china shop, always knocking things over.
take the bull by the horns 不畏艱險
You can‘t just sit back in a situation like this. You should take the bull by the horns.
like a red rag to a bull 使憤怒
Any statement against the government is like a red rag to a bull to that minister.
till the cows come home 永遠地，無限期地
If you‘re waiting for him to pay you, you‘ll wait till the cows come home!
kill the fatted calf 熱情款待，設宴歡迎
He welcomed me at home by killing the fatted calf
paper tiger 貌似強大而實質虛弱的敵人
As long as we are not of this kind of threat, the paper tiger‘s true face will come out in the wash.
hunt with the hounds and run with the hare 同時支持相對立的兩派, 腳踩兩只船
Which team are you going to support? Make up your mind now. You can‘t hunt with the hounds and run with the hare
sow (the) dragon‘s teeth挑起糾紛或引起爭端
Wherever he went, he sowed (the) dragon‘s teeth by preaching racial segregation.
a snake in the grass潛伏的危險或敵人，陰險而偽善的朋友
How could I ever trust that snake in the grass?
hold your horses 忍耐，克制，別急躁
Don‘t get so angry. Just hold your horses and find the appropriate solution
put the cart before the horse 本末倒置
Surely you‘re putting the cart before the horse by buying all this furniture before you‘ve got the house.
flog a dead horse徒勞，浪費精力
You‘ll just be flogging a dead horse if you try to make her change her mind about it.
When the president visited his hometown in the remote village, he rode the high horse among the local people.
a wolf in sheep‘s clothing披著羊皮的狼，偽裝善良的壞人
Mrs. Martin trusted the lawyer until she realized that he was a wolf in sheep‘s clothing.
as well be hanged for a sheep as (for) a lamb一不做，二不休；索性蠻干
Dad said I was to be home from the dance by eleven o‘clock, but I enjoyed myself so much that it was midnight before I realized it, so I thought I might as well be hanged for a sheep as a lamb and stopped on till the end.
a black sheep害群之馬，敗家子
Every privileged class tries at first to whitewash its black sheep; if they prove incorrigible, they‘re kicked out.
monkey about / around胡鬧，惡作劇
The boys were monkeying about in the playground, and one of them
You‘ll break the TV if you don‘t stop monkeying about with it.
get (have) one‘s monkey up生氣，發脾氣
Don‘t get your monkey up for nothing.
cock one‘s snook (snoot) to (at) sb. 瞧不起某人
The artist cocked a snook at the critics by exhibiting an empty
They completely cocked up the arrangements for our holiday.
a dog in the manger占著茅坑不拉屎的人，自私自利的人
Don‘t be such a dog in the manger. Lend your bicycle to him since you will not go out this afternoon.
Brazil can well be said to be the top dog in the soccer circles of the world.
lead a dog‘s life過困苦的生活
Many new immigrants in the U.S. initially endure a dog‘s life.
put on the dog炫耀，擺闊；竭力表現自己，似乎自己非常重要，而事實并非如此
They put on the dog in front of their guests, but the guests were not impressed.
pigs might fly無稽之談，奇跡可能會發生
“The management might offer us a decent pay rise.” “Pigs might fly！”
buy a pig in a poke(未見實物而)亂買東西(吃了虧)
You‘ll have to show me the car; I don‘t intend to buy a pig in a poke.