(verb)
to make a deep/low-pitched sound with a ringing or echoing quality, similar to that made by a large bell;
e.g. She heard the chimes bong as they knocked against each other.
(noun)
a type of pipe consisting of a larger tube or bottle for a liquid such as water and a smaller tube with a bowl, used for smoking drugs such as marijuana;
e.g. They set up the bong and the other things they needed to smoke.