wait. cancel post. gung-ho cannot be English. where did that phrase come from? China?
ok, yes. gōnghé, which is…an abbreviation for “industrial cooperative”? Like it was just a term for a worker-run organization? A specific U.S. marine stationed in China interpreted it as a motivational slogan about teamwork, and as a commander he got his whole battalion using it, and other U.S. marines found those guys so exhausting that it migrated into English slang with the meaning “overly enthusiastic”.
First contact, or a miscommunication about which miniatures you were supposed to bring to tonight's game (John Karp, The Space Gamer 17, May-June 1978)