I don't know how this will work out, but I thought instead of telling jokes on others, we might try a thread where we tell jokes that our in-groups (liberals, conservatives, rugby fans, vegans . . . ) tell on ourselves.

Though there are some anti-anti-vegan jokes I found hilarious, I admit it was hard to find self-depreciating ones. But here goes:

Why does vegan cheese taste lousy?
Because it isn't tested on mice.

A young vegan couple decided to spice up their life so they borrowed a copy of "The Joy of Sex." When they returned it, their friend asked them if the book had helped.
The woman replied, "It was disgusting. We didn't know what we were getting into."
The friend, a bit surprised, asked them if they were against free sexual expression.
"No," said the man, "but you wouldn't believe what they want us to put in our mouths!"

It was easier to find Buddhist humor. These are a couple I like:

"There is no 'I' in 'Buddhism'"

"If you have ice cream, I will give you ice cream.
If you have no ice cream, I will take away your ice cream"
(The ice cream koan)

This might be too esoteric, but it made me laugh:

Bumper sticker: 'My other vehicle is a Mahayana.'

(Hinayana Buddhism is called "the lesser vehicle," Mahayana "the greater vehicle.")