An extemly large bowel movement caused by a consumption of many tacos. Taco babies have been said to have a mind of their own, taking over you digestive track and cause unnatural symtems such as an overwealming craving for Mexican food. Taco babies are mesured in size and is expressed in camper-size form. For example, a small taco baby would be called a junior, wheras a larger baby would be a senior.
Mike: Damn, those tacos were so good at dinner.
Chuck: Yeah, I got a midi 2 Taco Baby brewing in my stomach.