food baby

noun2

1. •
   (humorous) A protruding belly resulting from the consumption of a large quantity of food; the contents of one's digestive system causing the protrusion.

   • I went to the restroom to give birth to a food baby... — 2006
2. •
   (vulgar, humorous) A large or painful bowel movement.

   • —Do you need help in there? —I'm having a food baby!