The act of redefining the conditions for victory or completion of a task, either when the original conditions for achieving them were met or whilst the person or group is busy working to achieve the current conditions, in order to prevent them from succeeding. Usually done with malice by a superior or peer looking to exclude or remove people from a group by portraying them as incompetent of not completing the task they keep altering.
When Jake was close to finishing his training, his supervisor who had always hated him started moving the goalposts by claiming that Jake needed four references of work experience instead of two in order to graduate, a condition that nobody else had to meet and with only one day left for the deadline. Jake didn't pass.
The name for October 30th used in Baltimore to describe mischief eve, or Devil's night. Moving night was typically the night of the year when kids would go around toilet papering houses, throwing eggs, and generally causing mischief. Kids would often stock up well ahead of time, because on October 30th stores ID for purchases of eggs, toilet paper, or shaving cream.