Jam' is a common term used to describe a problem with a photocopier where the paper gets stuck in the machine. This can happen when too many sheets are fed into the machine at once or when there is a build-up of toner on the rollers inside the machine. The result is that the paper cannot move through the machine and the copies cannot be made. The solution to this problem is to clear the JAM by removing the stuck paper and cleaning the rollers inside the machine.