Bog-standard is a well-known informal term, which originated in Britain; it means something ordinary or basic, but often in a dismissive or derogatory way.
corpsman. An enlisted person in the US Armed Forces who works as a member of the medical team. During duty in the armed forces he or she receives training and experience in one or more health-related fields. In wartime, a corpsman may be assigned as the only medically trained person to a field unit or a small ship.
1 A civilian who becomes a military paramedic and who helps take care of wounded soldiers on the battlefield is an example of a corpsman.  A member of a government-sponsored group such as the Peace Corp is an example of a corpsman.