1. The roundest knight at King Arthur's round table was
Sir Cumference. He acquired his size from too much pi.

2. I thought I saw an eye doctor on an Alaskan island,
but it turned out to be an optical Aleutian.

3. She was only a whisky maker, but he loved her still.

4. A rubber band pistol was confiscated from algebra class because
it was a weapon of math disruption.

5. The butcher backed into the meat grinder
and got a little behind in his work.

6. No matter how much you push the envelope,
it'll still be stationery.

7. A dog gave birth to puppies near the road
and was cited for littering.

8. A grenade thrown into a kitchen in France would result
in Linoleum Blownapart.

9. Two silk worms had a race. They ended up in a tie.

10. Time flies like an arrow. Fruit flies like a banana.

11. A hole has been found in the nudist camp wall.
The police are looking into it.

12. Atheism is a non-prophet organization.

13. Two hats were hanging on a hat rack in the hallway.
One hat said to the other, 'You stay here, I'll go on a head.'

14. I wondered why the baseball kept getting bigger.
Then it hit me.

15. A sign on the lawn at a drug rehab center said:
'Keep off the Grass.'

16. A small boy swallowed some coins and was taken to a
hospital. When his grandmother telephoned to ask how he
was, a nurse said, 'No change yet.'

17. A chicken crossing the road is poultry in motion.

18. It's not that the man did not know how to juggle,
he just didn't have the balls to do it.

19. The short fortune-teller who escaped from prison was
a small medium at large.

20. The man who survived mustard gas and pepper spray is
now a seasoned veteran.

21. A backward poet writes inverse.

22. In democracy it's your vote that counts.
In feudalism it's your count that votes.

23. When cannibals ate a missionary, they got a taste of religion.

24. Don't join dangerous cults: Practice safe sects!

And, saving the best for last:

25. There was a man who entered a local paper's pun contest. He sent in ten different puns, in the hope that at least one of the puns would win.
Unfortunately, no pun in ten did.