■ noun a person who makes and sells hats.
Phrases
( as ) mad as a ~ informal completely mad. [with allusion to the effects of mercury poisoning from the use of mercurous nitrate in the manufacture of felt hats.]
■ noun a person who makes and sells hats.
Phrases
( as ) mad as a ~ informal completely mad. [with allusion to the effects of mercury poisoning from the use of mercurous nitrate in the manufacture of felt hats.]
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004