A cab stopper is a person who works in the transportation industry to ensure that cabs are stopped at designated locations. The term 'cab stopper' is often used interchangeably with the term 'CORK, ' which is a four-letter word that can be used to describe the same job. The job of a cab stopper is to ensure that cabs are stopped at the appropriate locations and that passengers are able to get on and off safely. Cab stoppers also help to keep traffic flowing smoothly by ensuring that cabs are not blocking other vehicles.