Did you hear about the three holes in the ground?
Well, well, well!
What do you get when you cross a praying mantis with a termite?
A bug that says grace before it eats your house.
How many choreographers does it take to change a light bulb?
…uh, five, six, seven, eight!
Since you were just there, could you give us the link? Wonderful thread, as I recall. 
This is the home site, full of interesting sub sites. Scroll way down to find the anti-joke one.
What do you call a man with no arms and no legs floating behind a fishing boat?
Chum.
Thanks! I seem to remember we had a similar thread here and I thought you might have found that instead of the goldmine you did! 
I’ll hunt for ours unless somebody else beats me to it.
What do you call a guy with a rabbit up his ass?
Warren.
What’s the last thing that goes through a bug’s mind when it hits your windshield?
Its asshole.
What do you call a man with no arms or legs laying at your front door?
Matt.
What do you call a man with no arms and no legs lying by the door?
Matt.
It may not be the worst, but I’ll admit it’s pretty bad.
That took me two beats to get.
Lomita made it into a joke! Take that, Harbor City!
A related one:
How many flies does it take to screw in a light bulb?
Two. But don’t ask me how they get in there.
What did the grape say when the elephant stepped on it?
Nothing. It just let out a little wine.
Not the one I’m remembering, but fun anyway:
http://boards.straightdope.com/sdmb/showthread.php?t=719002&highlight=punchline
Jokes you’ll have to explain
03-22-2014
http://boards.straightdope.com/sdmb/showthread.php?t=629393&highlight=punchline
Tell Me a Joke
10-28-2011
How do you say “three felines drowned” in French?
Un Deux Trois Quatre Cinq.
Thanks! The first one made my head hurt, but I’m enjoying the second one.
I’ve been looking with no luck yet, but the one I’m trying to locate is something like “spoil the joke with a dumb punchline” or something along those lines. Based on my search criteria it’s going to be older than 2012 or have fewer than 50 posts.
But it’s enough of a jewel (I hope) to be worth further searching.
Does anybody else remember such a thing?
Are we taking the high ground and avoiding ethnic (religious) humor? I will defer to the Mass Mind.
I am. I know a terrible racist joke, which will not be posted. I wish I could erase it from my mind.
Here are two more joke threads I found while hunting that other one.
This thread consists solely of punch lines to jokes.
09-01-2003
Just the Punchlines, Please.
05-24-2005
Maybe I can think of something to help me locate that “anti-joke” thing.
Maybe not.
Telling Aggie jokes is popular in Texas:
An Aggie got a job at an east Texas sawmill. Just before lunch on his first day, he lost a finger. When asked how he lost it, he replied, “I just touched this big spinning thing here like thi…
Damn! There goes another one!”
At the end of the night, the Aggie turns to his girlfriend and asks, “Why is it every time I go out with you, I end up spending hundreds of dollars?”
And she says, “Because I’m a prostitute.”
One young Aggie was really afraid of catching AIDS.
So he practiced abstinence AND wore a condom.
Did you hear about the Aggie who won a gold medal at the Olympics?
He liked it so much that he decided to get it bronzed.