口语表达“as mad as a March hare 像三月的野兔一样疯狂”用来形容人极度疯狂或非常愚蠢。这是因为每值春季繁殖期，兔子会表现出一系列激动无常的行为，就像发狂一样疯疯癫癫的。

另一个与它意思相近的表达是“as mad as a hatter 像帽匠一样古怪疯狂”。有观点称，这两种说法之所以流行至今得益于刘易斯·卡罗尔的童话《爱丽丝漫游仙境》中的两个主要角色，“March Hare 三月兔”和“Mad Hatter 疯帽子”。

例句

We had an argument yesterday and he smashed all the plates in the kitchen – he was as mad as a March hare!

昨天我们吵了一架，他把厨房里的盘子都摔碎了，他当时真是发疯了！

Janet's as mad as a March hare - always saying and doing really bizarre things - but we love her just the way she is.

虽然珍妮特整天疯疯癫癫的，总是不断地说着和做着奇怪的事情，但我们仍非常喜欢她这个人。

When I started dancing, they all looked at me as if I was as mad as a March hare.

我一开始跳舞的时候，他们都看着我，就好像我在做一件很疯狂的事。