On the PGA Tour, the statistical category called "sand save percentage" refers to getting up-and-down out of a greenside bunker. Score doesn't matter. It could be for a 9, but if a player is in a greenside bunker, then gets out and into the hole in two strokes (up-and-down), it's a sandie.
For amateurs, "sandie" is more likely to refer to a betting game whereby any player making par after having been in a bunker on the hole wins points or money. The bunker can be at any spot on the hole. But the particulars are really up to those playing the game.

