mad as a hatter
idiomatic phrase
informal + old-fashioned
: severely mentally unsound
"Mad as a hatter," said the housekeeper. "Talks to himself, runs about waving his arms, won't come in for meals."—
Eva Ibbotson
Eva Ibbotson"The whole thing is dashed fishy and mysterious and the sooner I can get Mildred safely out of the place, the better I shall be pleased. The fellow's as mad as a hatter!"—P. G. Wodehouse
P. G. WodehouseDictionary Entries Near mad as a hatter
Cite this Entry
“Mad as a hatter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mad%20as%20a%20hatter. Accessed 28 Nov. 2024.
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