You can put lipstick on a pig, but it is still a pig.

“给猪涂上口红,它还是猪。”意思是做无用功。

A hog in a silk waistcoat is still a hog.

某项政策、措施或行动并不能改变事情的本质，甚至更为糟糕。

You cannot make a silk purse out of a sow's ear.

粗瓷碗雕不出细花来

in a pig's eye

某件事根本不可能发生

casting pearls before swine

明珠暗投；对牛弹琴

piggy bank

储蓄罐

high on the hog

奢侈地；豪华地

hog-wild

（美国俚语）极粗野的，疯狂的，发疯的

hog

贪心攫取；独占

road hog

自私的司机；鲁莽的驾驶员

earmarks

指定款项

pork

联邦或州政府给手下人的好处(金钱或位置)

bring home the bacon

养家糊口；谋生

pig out / make a pig of oneself

大吃大喝

When pigs fly

无稽之谈；不可能的事

go the whole hog

干到底；彻底地干

ground hog

土拨鼠

bleed like a pig

血流如注

buy a pig in a bag

没有仔细看货就买下来；盲目答应

get the wrong pig by the tail

[美]捉错了人;；怪错了人;；搞错了对象

give sb. a pig of his own sow

以其人之道还治其人之身

sell a pig in a poke

用欺骗手段出售货品; 挂羊头卖狗肉

sweat like a pig

(因出力或恐惧而)全身冒汗

teach a pig to play on a flute

教猪吹笛, 做荒唐[不可能]的事

What can you expect from a pig but a grunt.

狗嘴里吐不出象牙来。