Bowel Baby Share definition Flag when you take a crap so big (and possibly painful,) it's like you had a baby in the toilet. When John came back from the restaurant bathroom, he told us that he had delivered a bowel baby. Bowel Baby by Iamtocool August 23, 2011 0 0 Get merch Get the Bowel Baby mug. Buy Now — $32.95 See more merch