英解：an alcoholic drink taken to cure a hangover

“Hair of the dog”这句俚语更完整的说法是“hair of the dog that bit you”,它的典故出自以前有种传说：“如果不小心被狗咬伤，只要从咬伤人的那条狗身上取下一些狗毛涂抹在伤口上，就可以治愈”，这句话几经演变，后来逐渐被用来比喻“一个人酩酊大醉之后，隔天早上用来解宿醉的一杯酒”。

Example：例句

A：Man, you were totally wasted last night!

老兄，你昨晚喝得真是烂醉！

B：Yeah, I've still got a bad hangover. Some hair of the dog would probably make me feel better.

对啊，我到现在头还是很痛。来点解宿醉的酒或许可以让我舒服些。