Do you have any humorous terms for when your child fouls themselves?
I'm a first-time dad of a three-month old girl and when she pees my wife and I say she "peached herself". If it's poop, or what passes for poop for newborns, we either say she "pooched herself" or my personal favorite, "she bricked her britches".
Baking brownies, or sprung a leak.
We all know that situation where poop exits the back of the diaper and runs up the spine to the shoulder blades. What we have here is a Failure To Contain.
I don't know if there's an official name for those but my wife calls them "blowouts". Failure to contain does have a certain gravitas to it.