Here are some randomly selected joke topics beginning with the letter 'N'
Nuisance
My dog is a nuisance. He chases everyone on a bicycle. What can I do?
Take his bike away.
Nothing
I started out with nothing...and I still have most of it left.
Nothing
If you have nothing to do, please don't do it here.
Numbered
Why was the calendar sad?
Because its days were numbered.
Notice
I've got a bad stomach.
Well just keep your coat on and on one will notice.
Nurse
Doctor: Nurse, I'm ready to see the next patient now, can you send her in?
Nurse: Sorry, she didn't look very well, so I sent her home.
Notice
Notice - If you notice this notice you will notice its not worth noticing
Nothing
Knock knock
Who's there?
Scott
Scott who?
Scott nothing to do with you.