A situation where you're attempting to mediate 2 parties and both of them are being difficult to work with and blaming you instead of recognizing you as the only reasonable person attempting to help them both meet their objectives,
Trying to schedule 2 executives at different companies for a meeting and their being impossible and contradictory to jeopardize the meeting that allegedly "important" to both. The "scheduler" is caught in an Intransigence Sandwich.
The same as a normal pimp-slap, where you assault your target by slapping him/her with the back of your hand, except you run your hand down your own butt crack 1st. This marginalizes and denigrates the offender even further.
I was so upset with this loudmouth drunk at a bar, that I had to shut him up; so I dirty pimp-slapped him into submission.