A chillum is a type of pipe that you can use to smoke things like tobacco or herbs. It is often made out of clay or stone and looks like a long tube with a bowl at one end where you put the tobacco. The other end has a small hole where you put your mouth to inhale the smoke.
To use a chillum, you need to first make sure that the tobacco is finely ground up and packed tightly into the bowl. Then, you light the tobacco with a lighter or match and inhale the smoke through the small hole.
It's important to be careful when using a chillum, as the bowl can get very hot and burn your fingers. You should also not share a chillum with others unless it has been thoroughly cleaned, as this can spread germs or illnesses.
Overall, a chillum is a type of pipe that you can use to smoke things like tobacco or herbs, but you need to be careful when using it and not share it without cleaning it first.