Green Thumb

Somebody once told me that her uncle, a botanist, had a real green thumb. I told her that he should really get that looked at, because if his thumb has turned green that can't be a good sign, as it is probably infected or something. Some people aren't very good at recognizing signs of health problems.

Gravy Train

A friend in high school once told me that her weekend babysitting job was a real gravy train. I told her that it seemed to me like babysitting gravy would be a pretty boring job, regardless of whether it was on a train, on a plain, or even in the rain. Some people will do anything for money.