This page deals with slang terms for a Zombie apocalypse, in the heat of the moment it's easy to garble in horror at the situation and important messages are lost so easy terms are introduced by the military which are inevitably adopted and mutated by civilians.
In art, an underpainting is an initial layer of paint applied to a ground, which serves as a base for subsequent layers of paint. Underpaintings are often monochromatic and help to define colour values for later painting.
Encopresis is the soiling of underwear with stool by children who are past the age of toilet training. Because each child achieves bowel control at his or her own rate, medical professionals do not consider stool soiling to be a medical condition unless the child is at least 4 years old. This stool or fecal soiling usually has a physical origin and is involuntary -- the child doesn't do it on purpose. In the U.S., it is estimated that 1%-2% of children younger than 10 years are affected by encopresis. Many more boys than girls experience encopresis; approximately 80% of affected children are boys.