a degree of raining. A very heavy rain that sounds like someone is pouring buckets of rain to the ground. Extremely wet forceful rain (when it's bucketing you can't stay dry.)
It was bucketing rain so everyone stayed indoors to keepdry.
It's a term used to describe the walk of a person who has consumed to much Ketamin.Imagine someone with a bucket stuck on each foot trying to walk,you get the picture.