She smiled at him as if they had some private joke going between them.

It was something of a private joke between him and the general.

She smiled as if he'd told her a private joke.

We had 10 years of private jokes and a word can just send us.

It was, even at its beginning, a happy private joke between two wise women.

The thing was just a private joke between my wife and me.

The message had to be a private joke, since no one else could have been expected to find it.

He chuckled a little, as if at a small private joke.

Or maybe he was just amused at some private joke of his own.

Rather, he seemed to include her in some private joke that only she would appreciate.

"I can always tell when there are a lot of teachers in the audience because they get the inside jokes," she said.

It was as though they had just shared an inside joke that no one else would understand.

Not bad for a series that started as an inside joke.

And he smiled as if amused by some inside joke.

Those people would never understand how important it was to find someone in life with whom to share the inside jokes.

The President replied that the reporter's question was an inside joke.

The others looked at one another, clueless as to the inside joke.

He does not like curves, something of an inside joke.

Maybe it was somebody's idea of a very inside joke.

Their familiarity with one another allows them to turn each performance into a series of inside jokes.