gangbusters (n.)youdaoicibaDictYouDict[gangbusters 词源字典]
to come on like gangbusters (c. 1940) is from popular U.S. radio crime-fighting drama "Gang Busters" (1937-57) which always opened with a cacophony of sirens, screams, pistol shots, and jarring music.[gangbusters etymology, gangbusters origin, 英语词源]