>>34327
Conscripts were divided into three orders:
kopasz = bald, whom we already met.
gumi = rubber, in the midterm, I read somewhere that they could held the ends of their trousers to their boots with a rubber band, instead of tucking them into the boots, and this is the origin of the term, but basically it meant they could get away with some liberties. Mostly they were those who bullied the baldies.
öreg = old, in third term, waiting to be discharged. They didn't give a shit anymore.

The military university published a collection of the military slang. The author even wrote a little study about the topic, how the slang originates and differs from the jargon, how the words were created or where were they loaned from, etc. Throughout the whole dictionary he points out the wordplays and gives longer examples for the context.
I give the link even tho one needs to know Hungarian ofc, but it can serve as illustration.
http://mnytud.arts.klte.hu/sorozat/katszl/index.html
For the unexpected Hungarian visitors I upload the pdf maybe someone will be interested.