What is bag nasty?
bag nasty meaning in Military or Military Slang terminology / glossary / dictionary is:
(U.S.) The name given to the fast food options in chow halls, i.e.; hot dogs and hamburgers. Also common reference for MRE’s. In the Air Force, commonly a reference to pre-packed Flight Lunches intended for aircrew or personnel whose duties do not allow them to go to the chow hall to eat their meals. Also see Box Nasty.