Uncock
To straighten the wrists in the downswing.
Underclubbing
Using a club that does not give the needed distance.
Underspin
Same as backspin.
Unplayable Lie
A lie in which the ball is impossible to play such as in a thicket of trees.
Up
A shot reaching at least as far as the hole.
Up
A specified number of strokes you are ahead of your opponent in match play.
Up and Down
Getting out of trouble or out of a hazard and into the hole.
Upright Swing
A swing that carries the club head more directly backward and upward from the ball.
USGA
United States Golf Association.