What is an inside joke?
Wikipedia entry.
Urban Dictionary entry.
Uncyclopedia category.
Everything2 definition.
Definition by an SEO writer.
Does a inside joke have to be shared?
Where can one read inside jokes at The Northville Review?
Here, here, here, here, here, here, and here.
Other places one might find inside jokes:
A website run by U.S. Cellular.
Nearly anything having to do with Muppets.
Or Homestar Runner.
Or Walt Disney World Today.
Or Wesleyan University.
Or The X-Files.
But not in some parts of Canada, apparently.
A GameSpot forum.
An interview show.
On Facebook.
The New York Times.
Where can you send your inside joke?
Here.