Corncob Surprise

The situation or act of being constipated and finally having a bowel movement which is very hard, cracked, dried out, and contains embedded pieces of corn kernels (Maize) on the surface, such as a Corncob.

Woah! I forgot that I ate corn the other day! I just looked into my toilet and found a Corncob Surprise that sank to the bottom of the toilet bowl!