mad as a hatter
成語所屬單字hatter
mad as a hatter — 慣用語
1. behaving in a crazy or very silly way; extremely eccentric.
1.慣用語
釋義
非常瘋狂的；極度古怪的
behaving in a crazy or very silly way; extremely eccentric.
例句
Grandpa tells the same wild stories every time we visit — he's mad as a hatter, but we love him.
The main character of the novel is an inventor who is mad as a hatter, building flying machines in his tool shed.