I went through training at Aviation Officer Candidate School in Pensacola, FL in 1969, under the care and tutelage of Marine DI's. We used the term "Jody Call" and the informal leader was the "Jody Call Body". I owned the title for several months, more on the strength of a strong voice than an encyclopedic knowledge of calls. The calls were much like Sea Shanties in structure and purpose. One common format was to have each line echoed by the column. A local favorite example was:

I don't know but I been told (echo) Navy wings are made of gold. (echo) I don't know but I heard it said (echo) Air Force wings are made of lead. (echo) Sound off etc.