Mad as a hatter

Mad as a hatter

Mad as a hatter

Mad as a March hare / Stark mad


Matto da legare

Pazzo da legare / Pazzo furioso

Matto da legare

Matto da legare


Examples
Anyone who says it's fun driving during rush hour is mad as a hatter
Chiunque dica che è divertente guidare durante l'ora di punta è matto da legare

If you think I'm gonna let you use my pool for your shark breeding, you must be out of your mind
Se pensi che io ti lasci usare la mia piscina per il tuo allevamento di squali, sei pazzo da legare

Origin
Once hats were usually made of felt, in which fibers of wool or fur were pounded (felted) together, rather than woven. To make felting process quicker, hat-makers used to treat wool with mercury, which is a poison to the nervous system. After some years many hatters would develop tremors called "hatter's shakes" and eventually psychosis