Idiom
n. phrase or sentence whose meaning is not clear from the meaning of its individal words and which must be learnt as a whole unit.
一个词组或句子，不是表面的意思，有隐义
It's not my cup of tea. 那不是我喜欢的
I won't do that even you paid me. 付我钱我都不干
Can't learn an old dog new tricks. 老狗学不会新把戏
Are you pulling my leg? 你在和我开玩笑吧？
dead easy 形容非常简单
a finger in every pie 形容一个人在任何领域都有接触
学了太多太多了，感兴趣可以加我