Booze mining is the practice of hiding a quantity of alcohol (and/or drugs) before the security goes up for an outdoor festival (say, like Lollapalooza) by burying it on the grounds, often with a geotag on the location, and digging it up after the show starts.
"What're you doing there?"
~ "I'm digging up my booze, man!"
"Dude, I so thoughtbooze mining was an Urban Legend!"
In the music industry, when the "sound guy" makes an opening band sound bad (by poorly mixing them) to make the headlining band sound better.
The practice is mentioned in Five Iron Frenzy's song "Blue Mix" from the album "Electric Boogaloo." Lead singer Reese Roper disclosed the song's meaning in the November/December 2001 issue of HM (Hard Music) Magazine.
Blue mixing these next few bands will help us out Joel, we don't want these kids to forget who the main event is...
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.