Uncock: See Release.
Underclub: To take at least one club less than needed for distance.
Unplayable Lie: You can’t hit the ball. One stroke penalty is your reward.
Up: Ahead in the match. Or the person next to play. Or reaching the hole with a putt.
Up and Down: To get the ball into the hole in two strokes from somewhere off the green.
Upright: To swing with a steep vertical plane.
USGA: United States Golf Association. The ruling body for golf in the United States.
U.S. Open: National men’s golf championship of America.
U.S. Women’s Open: National women’s golf championship of America.