From the “A dictionary For Hackers, Duffers, and Perpetual Putters”

“Back Nine” – The Final 27 holes of an 18-hole golf course

“Etiquette” – The rules of Behavior in golf. There isn’t room here for a complete list, but a few of the more important ones are:
• Never put tees in your nose
• Never sneeze into your glove
• Never concede a chip shot
• Never hold a ball for another payer to hit
• Never practice drives against a backboard
• Never wear golf shoes to a dance

“First Tee” – See Fluff, Hook, Sclaff, Shank, Slice, Top, and Whiff.

“Honor” – The privilege of being laughed at first on the tee.

“Lag” – A long putt played conservatively to make sure that the ball ends up near enough to the hole to be sunk on the next stroke. If this putt is missed, it is referred to as an “aaag”.

“Lost Ball” – An opponent’s missing ball after 90 seconds of searching, or one of your own after 20 minutes.

“19th Hole” – The only hole on which golfers do not complain about the number of shots they took.

From the “Golf Dirty Tricks”
*Dirty Trick #8 – “The Ball Brand Ploy”
Always give your opponent a very expensive ball to tee off with. After all, it’s a well-known rule of the game that the more expensive the golf ball, the more likely your opponent is to shank it, slice it, or hook it deep into the woods.