Santa is driving up a steep, narrow mountain road. A woman is driving down the same road.
As they pass each other the woman leans out the window and yells, 'PIG! ! '
Santa immediately leans out his window and replies, 'BITCH! ! '
They each continue on their way, and as the man rounds the next corner, he crashes into a pig in the middle of the road.

Edwin Drood

http://www.poemhunter.com/poem/bitch-a-funny-story/