"civilian who is thought to be prospering back home with a soldier's sweetheart, wife, job, etc.," by 1979, said to date from World War II, from masc. proper name Jody, for no clear reason. Hence Jody call.
joculator
jocund
jocundity
jod
jodhpurs
Jody
Joe
joe
Joe Miller
Joel
joepye-weed