Definition of gung-ho adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɡʌŋ ˈhəʊ//
; NAmE NAmE//ˌɡʌŋ ˈhoʊ//
(informal, disapproving)
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too enthusiastic about something, without thinking seriously about it, especially about fighting and war Many people found her gung-ho attitude to the war deeply offensive. Word OriginSecond World War: from Chinese gōnghé, taken to mean ‘work together’ and adopted as a slogan by US Marines.
See the Oxford Advanced American Dictionary entry: gung-ho