Most Golf Courses forbid bringing your own beer on the course. They want you to purchase the beer from the Club House or from the beer girl out on the course (which is expensive).
Sneaking your own beer in your golf bag is the norm. But so nobody working there gets suspicious, buy a beer or 2 from the club, aka "honest beer".
-"I have like 12, but here comes the beer wench so we better get a couple honest beers"