mad as a March hare
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Crazy, demented.
Register: informal
Where it’s used:
Used
American English
Examples
[S]he was with childe in hir huſbande his abſence, or that hir louer vſed hir fondly in open preſence, as the preſumption was not onely vehement, but alſo the fact too too apparent. Hir vnfortunat huſband had not ſooner notice gyuen him vpon his returne of theſe ſorowfull newes, then his fingers beg
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “mad as a March hare” mean?
Crazy, demented.
Is “mad as a March hare” formal or informal?
mad as a March hare is generally informal.