The test
One question sorts this entire category: would they take it to the course anyway? If the answer is yes, the joke is a bonus and the gift keeps working every week. If the answer is no, you have bought a punchline with postage.
It is a harsher test than it sounds, and most of what is sold as a funny golf gift fails it. The mug that says the golfer is bad at golf, the plaque, the trophy for last place — these are all objects whose only function is the sentence written on them, and an object whose only function is a sentence gets read once.
Three shapes that work
1. A useful thing with a joke built in. The clearest example is a divot tool with a bottle opener on it. It does the job any divot tool does, and it also makes a quiet observation about what most weekend golf involves. The joke is delivered every time the tool comes out of a pocket rather than once on the day.
2. A joke that lives at home. Golf-themed glassware sits on a shelf and gets used on evenings when there is no golf. It is a decent present that happens to be funny, which is a stronger position than a funny present that happens to be useless.
3. A joke that is a friendly accusation. A ball retriever says you lose your ball in water. A rules card says you argue about the rules. Both are genuinely useful, and both are much funnier because they are specific to the person. This is the shape to reach for when you know the golfer well.
Socks are the safest funny gift in golf
Golf has a dress code and most of it is dull, which makes socks the one place a golfer can be openly ridiculous without anybody being able to say anything about it. They are cheap, they need no hand and only a rough size, and they are worn.
One caveat that applies to every wearable joke: the golfer is the one who has to stand in it for four hours in front of their playing partners. Socks are largely hidden. A slogan hat, shirt or towel is not, and it commits them to your joke in public far longer than they signed up for.
Read the golfer before you buy the joke
There are two kinds of golfer and the same gift lands differently on each. The social golfer plays for the company, keeps a rough score, and will find a drinking-adjacent joke funny. The club golfer plays competitions, posts scores, and is standing on a first tee next to people who take it seriously — for them, the bottle-opener divot tool is a slightly awkward thing to produce.
If you do not know which one you have, buy something that is funny at home rather than funny on the course. Glassware and books are safe; anything that has to be produced in front of strangers is not.
What to avoid
Trophies and plaques for being bad at golf. The joke depends on the recipient finding their own game funny. Plenty of golfers do not, and you usually cannot tell from outside.
Exploding or trick balls. They work once, in a specific setting, with an audience — which means they only work if you are there. As a wrapped present they are a box of props.
Slogan shirts, hats and towels. All three are worn or hung where every playing partner reads them for the length of a round. Our reasoning on the towel version is on the golf towels page.
Anything expensive. Funny is a $15 to $40 gift. Past that the joke is carrying too much weight, and the recipient is now the owner of an expensive joke they cannot get rid of.
How to give a funny gift as the main present
Pair it. A funny gift alongside something genuinely wanted is the strongest combination in this whole category: the joke does the opening and the real gift does the rest. Socks plus a dozen balls, or the bottle-opener tool plus a decent towel, both land better than either half on its own and still come in under $50.
If you want the whole thing to be a joke and still be a real present, a gift basket is the format that does it — one funny item is a joke, five funny items is clearly a bit, and the bit is the gift.