俚语是口语英语很重要的一环，本书用四格漫画的形式，在展现兄妹两的日常中解释了英语俚语的来由与用法。图片的形式更方便理解与记忆。 四格漫画中看似很随意，但是一本都遵循了 提出俚语——解释俚语——活用俚语 这个步骤。让读者感受到原来俚语也可以这么简单。

A diamond in the rough 1
A drop in the bucket 2
A frog in one’s throat 3
A piece of cake 4
A shot in the dark 5
Achilles’ heel 6
An arm and a leg 7
An eye for an eye 8
Apple of your eye 9
Armed to the teeth 10
As cool as a cucumber 11
At the drop the a hat 12
At the eleventh hour 13
Back to square one 14
Backseat driver 15
……
Under the gun 169
Under the weather 170
Under your nose 171
Up against the wall 172
Upper crust 173
Watched pot never boils 174
Wear heart on sleeve 175
Wet behind the ears 176
When pigs fly 177
When the chips are down 178
Whistle in the dark 179
Word of mouth 180
You are what you eat 181