gung-ho /ˌɡʌŋ ˈhəʊ $ -ˈhoʊ/ BrE AmE adjective informal
[ Date: 1900-2000 ; Language: Chinese ; Origin: gonghe , from jongguo gongye hozo she 'Chinese Industrial Cooperatives Society' , used as a battle cry (meaning "work together") by U.S. soldiers in World War II ]
very eager to do something dangerous or violent:
The sporting opportunities here should suit the most gung-ho of tourists.