When I was in boot camp I had a very bad cold and was sent to the naval hospital in San Diego in case pneumonia was developing.
An X-ray was taken and a puzzled technician asked me if I had ever had surgery on my large intestine. I said I had not, and he pointed out what he thought was scar tissue in the X-ray, an object about the size of a baked potato.
Stumped as to what it was he asked a passing doctor his opinion. The doc glanced at it and said it was “A UBF. An UnBorn Fart.”
I blamed it on the chow they served us. I failed to get a copy of that X-ray. I would have had it framed, I think. With a button sewn on it.