gangbuster: Meaning and Definition of

gang•bust•er

1. a law-enforcement officer who specializes in breaking up organized crime, often by forceful or sensational means.
2. someone or something having great impact, usually in a positive way.
3. an outstandingly successful state or situation: We aren't looking for gangbusters, but we'd like you to pass all your subjects this semester.
4. with great speed, intensity, vigor, impact, or success: The software market was growing like gangbusters. The hockey team came on at the beginning of the season like gangbusters.

1. to be extremely successful: The movie went gangbusters.