A golfer who often slices and hooks after striking the golf ball. Most golfers have one or the other (slice or hook) but someone who plays "army golf" hits both types of wayward shots. He/She hits one right, left, right, left just like they are marching in the army.
Golfer 1: "Hey Bill, how did you hit em'?
Golfer 2: "Oh man I was playing army golf today... Right, Left, Right, Left."