Merp can be used in an catch-phrase to throw people off guard or to have one beg the question Does this person really think he is a grammatitician, I think not! Additionally, one can use the word merp as a euphemism in public as not to offend any people in proximity.
Natural birth to some women means a labour without any medical pain relief, leading to a vaginal birth, and possibly third stage, without any interventions at all. Midwives and obstetricians have their own working definition of natural birth, which sits somewhere in between these different viewpoints.
The manner of death is determined by the medical examiner. Natural Deaths. Natural is defined as death caused solely by disease or natural process. If natural death is hastened by injury (such as a fall or drowning in a bathtub), the manner of death is not considered natural.