Bohica

Military slang is an array of colloquial terminology used commonly by military personnel, including slang which is unique to or originates with the armed forces. In English-speaking countries, it often takes the form of abbreviations/acronyms or derivations of the NATO Phonetic Alphabet, or otherwise incorporates aspects of formal military terms and concepts. Military slang is often used to reinforce or reflect (usually friendly and humorous) interservice rivalries.
A number of military slang terms are acronyms. Rick Atkinson ascribes the origin... plus