For sure - part of what makes it such a 'club', but certainly must be frustrating or excluding for people outside the service. It's the same with any specialist area, and its certainly a skill to be able to communicate without using jargon when it becomes so much a part of your everyday vernacular.
Personally my pet hate is acronyms
SACFS uses CABA in accordance with COSO's under an AIIMS structure to establish an IMT that oversees incidents where members may work with SAPOL, SAAS, SASES and others giving SMEACS, and SITREPS on GRN to the OIC who receives information from BOM to determine the FDI, all while listening out for DSU's and following with an AAR....