While suturing a cut on the hand of a 75 year old
The old rancher said, 'Well, ya know, Obama is a 'post turtle.'
Not being familiar with the term, the doctor asked him what a 'post turtle' was.
The old rancher said, 'When you're driving down a country road and you come across a fence post with a turtle balanced on top, that's a 'post turtle.'
The old rancher saw a puzzled look on the doctor's face, so he continued to explain.