Unplayable
A player can declare his ball unplayable at any time when it is in play (other than at a tee), and can drop the ball either within two club-lengths, or further from the hole in line with the hole and its current position, or where he played his last shot. A penalty of one stroke is applied. A ball declared unplayable within a hazard must be dropped within that hazard.

Up and down
When a player holes the ball in two strokes starting from off the green. The first stroke, usually a "pitch", a "bunker shot" or a "chip", gets the ball 'up' onto the green, and the subsequent putt gets the ball 'down' into the hole. (var.) "up and in"