gung-ho
/ˈgʌŋˈhəʊ/adjective
- unthinkingly enthusiastic and eager, especially about taking part in fighting or warfare（尤指对打架或参战行动）轻率地表示热心的, 瞎起劲的; 狂热的：
the gung-ho tabloids have wrapped themselves in the Union Jack.
那些狂热的好战小报用英国国旗包装自己。
词源
Second World War: from Chinese gōnghé, taken to mean 'work together' and adopted as a slogan by US Marines.