“倾盆大雨”,汉语成语,字面意思是“雨水像从盆里泼出来一样”,比喻雨大势急(to rain extremely heavily)。与英文习语“rain cats and dogs”意思相近,表示“to fall as water in a continuous stream of drops from the clouds”。
例句:
今天一定要带把伞,因为外面正下着倾盆大雨呢!
Be sure to carry an umbrella today, because it's raining cats and dogs out there!