MADD is a US group whose name stands for Mothers Against Drunk Driving. You say it like the word mad, not letter by letter. A mother started it after a drunk driver killed her daughter, and the group’s job is to stop people driving after they have had too much alcohol. They talk to the public, push for stronger laws, and keep the problem in the news. In American English, drunk driving is the usual phrase; the same idea in Britain is often drink-driving. The group is American, so you meet the letters MADD mainly in US news, school talks about safety, or stories about changing the law (for example, making it harder for young people to buy drink, and punishing drunk drivers more). It is the name of one organisation, not a general English word for “angry mothers.” People sometimes use MADD loosely to mean any campaign against drunk driving, but strictly it is that group.

反酒駕母親協會（美國組織，通常直接說 MADD）。台灣說「酒駕」，不說中國常用的「醉駕」。