"Patting each other on the back" would fit the bill. For example

If you're finished with this circle jerk, maybe we could move on to new business.

could be replaced with

If you're finished patting each other on the back, maybe we could move on to new business.

“Patting each other on the back” would fit the bill. For example:

If you’re finished with this circle jerk, maybe we could move on to new business.

Could be replaced with:

If you’re finished patting each other on the back, maybe we could move on to new business.