1. Short for dead ball shot .
2. A ball that has been used for some time, with a dirty surface, as opposed to a slick new (or highly polished used) ball. A spinning dead ball will transfer more spin to other balls it comes into contact with, and not be as fast on the cloth . Even cut shot angles may be affected because of the cling or skid (British: kick ) effect, and professional players often ask a referee to clean a ball, mid- game . Others may actually be more used to dead balls and prefer them.