(informal)allow oneself to get carried away by enthusiasm or excitement(非正式)狂欢
like mad
(informal)with great intensity, energy, or enthusiasm(非正式)发疯似的；狂热地；拼命地；猛烈地
(as) mad as a hatter
(informal)completely crazy(非正式)非常疯狂的；全然神经错乱的
mad keen
(informal)extremely enthusiastic(非正式)极其狂热的
like mad【非正式用语】
Wildly; impetuously疯狂地；迅疾地To an intense degree or great extent在很大程度上或限度上
mad as a hatter
Crazy; deranged.发疯的；发狂的
英语四级真题
Francesca Haass, a senior at middlebury, says, "I find the in-class ones are more stressful in the short term, but there is immediate relief as you swallow information like mad, and then you get to forget it all."
2017年12月四级真题（第一套）阅读 Section B
英语六级真题
When performing, he positions his instruments in a way that is deliberately inconvenient, so that switching from guitar to organ mid-song involves a mad dash across the stage.
出自-2013年12月阅读原文
If humans are generally geared to recall details about one another, this pattern is probably even more powerful among teenagers who are very attentive to social details: who is in, who is out, who likes whom, who is mad at whom.
2018年6月六级真题(第二套)阅读 Section B
柯林斯高阶英汉双解学习词典释义
ADJ
疯狂的;精神错乱的
Someone who is mad has a mind that does not work in a normal way, with the result that their behaviour is very strange.