March hare
noun
- informal a brown hare in the breeding season, noted for its leaping, boxing, and chasing in circles〈非正式〉三月里的野兔（指交配期的野兔, 这时的野兔性喜蹦跳, 用前掌扑击, 绕圈追逐）。
短语
(as) mad as a March hare
- (of a person) completely mad or irrational; crazy（人）像三月里的野兔一样疯狂。