bong

Also known as water pipe, billy, bing, moof, smoking water pipe

thumb|125px|right|A bong with a circular carburetion port in the front of the bowl A bong (also known as a water pipe) is a filtration device generally used for smoking cannabis, tobacco, or other herbal substances. In the bong shown in the photo, the smoke flows from the lower port on the left to the upper port on the right.