Keeper - A successfully executed shot.

Keeping Score - In general, golfers assign a number exactly one higher than the previous one for each shot they play to arrive at the cumulative total of all the strokes required to complete a given hole. While it has the merit of simplicity, this system does tend to produce discouragingly high numbers, and players who perennially score in the 90s or higher might think about switching to an unconventional numbering system which, while still adhering strictly to the custom of counting each and every stroke, nevertheless provides a more acceptable result. Two excellent candidates are the arithmetic series -2,-1,0,1,2,3,4 etc. and 1,2,2,3,3,3,4,4,4,4 etc.

Knee-Knocker - A putt in the three-to-four-foot range that causes emotional and physical problems for the golfer. The term comes from the nervous trembling that accompanies these short putts. Every golfer experiences a knee-knocker at some time. (See also throw-up range and yips.}

Knickers - Baggy trousers worn by golfers in the 1930s. They were called "plus fours" because they were cut off four inches below the knee, then tucked into long socks. Plus fours have disappeared from golf courses, and the only golfing apparel anything like them that exists today is a much more appealing form of attire, worn by women, known as "minus tens."

Knife - One iron. The toughest club to hit. If you carry a 'knife in your bag, you're either a real player or a phony who wants to look like a real player. A few swings with the knife will reveal the true you. Lee Trevino advises golfers caught in a lightning storm to hold their one irons aloft because "even God can't hit a one iron."

Knock-Down - A type of shot designed to have a very low trajectory, usually employed to combat strong winds.

Kelly Rule - Applying a Kelly rule occurs when a player adapts or interprets the Rules of Golf to gain advantage in a given situation on the course which would otherwise be to his or her disadvantage.