6.(temporary)发狂的；发疯的；爆发的
7.(ferocious)+ animal异常凶猛的
8.(having rabies)+ dog, animal患狂犬病的
9.like mad<非正式>(energetically; one person or more than one person)玩命地；疯狂地；狂热地
He was weight training like mad.他在玩命做负重训练。
We trained like mad.我们疯狂地训练。
10.to be mad keen on sth<非正式>(very keen on)对某事物着迷；对某事物狂热
He was mad keen on the idea.他对这一想法十分着迷。
11.as mad as a hatter
+ person非常疯狂的
Billy was as mad as a hatter.比利是个非常疯狂的人。