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.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.