bowl slapper
A large or constipated stool that requires leaning forward and slapping the front of the toilet bowl as a compensatory measure to expel the aforementioned stool. May be accompanied by the tapping of the feet, heavy breathing, sharp pains and an internal promise to eat less and drink more water.
Too much heavy holiday food has made for some excruciating trips to the restroom. Last nights turd was a real bowl slapper. I needed the handicap rails for extra grip.