be as mad as a March hare

be as mad as a March hare

To be crazy. The phrase alludes to hares' erratic behavior during their breeding season. Mom was as mad as a March hare after I dented her brand-new car.
See also: hare, mad, march
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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.
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