I've never heard it used before and I've played this game for nearly a decade.... soo.....

Maybe instead of using whatever vernacular you've picked up somewhere, just explain it? Instead of saying "mountainous set up" and spoilering it, just say in a game with no power roles.

The meta commentary is unnecessary and distracting.

If you can't play the game without throwing out random terms instead of actually explaining yourself than yeah, this game wont go well for you.