March hare

(redirected from Mad as a March hare)
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March hare

n.
A hare in breeding season, when it typically engages in aggressive behavior.

[So called because hares were traditionally said to engage in such behavior in the month of March.]

March hare

n
(Animals) a hare during its breeding season in March, noted for its wild and excitable behaviour (esp in the phrase mad as a March hare)
References in periodicals archive ?
Everyone is entitled to be as mad as a March Hare, and I am delighted I went through my phases at 14-16 before I started my life.
Never mind the fact hunt sabs come in both genders and all ages, the writer of this heap of rubbish felt the need to portray the monitor as a woman of a certain age who was as mad as a March hare and uncaring to the point of hypocrisy.
It's all mad as a March hare - but you can see why they lap this stuff up abroad.