Why do we say these expressions ?
The expression “as mad as a March hare” alludes to the excited behaviour of hares during their mating season. The phrase was first coined around 1500, and has been in continuous use since then. It was employed by eminent writers such as John Skelton, Thomas More and notably, by Lewis Carroll in Alice’s Adventures of Wonderland in 1865.
Another lighthearted phrase we use to describe deranged antics is “as mad as a hatter.” This expression is thought to have its origins in the hat-making profession of the 18th and 19th century where the use of mercury ultimately poisoned the workers, giving them slurred speech, memory loss and tremors, and sometimes even hallucinations. Again, Lewis Carroll used this idea in his character the Hatter, who interacted with Alice in a nonsensical manner. We generally refer to to this character nowadays as the Mad Hatter, although Lewis Carroll only ever called him the Hatter.
Do you know any other expressions to refer to crazy behaviour?