gangbuster

[ gang-buhs-ter ]
/ ˈgæŋˌbʌs tər /

noun Informal.

a law-enforcement officer who specializes in breaking up organized crime, often by forceful or sensational means.
someone or something having great impact, usually in a positive way.
gangbusters, an outstandingly successful state or situation: We aren't looking for gangbusters, but we'd like you to pass all your subjects this semester.

adjective Often gangbusters.

of or like a law-enforcement officer who uses rough, aggressive, or sensational tactics in fighting crime: The undercover agents avoided the gangbusters approach.
strikingly effective or successful: a gangbusters year for compact cars.
enthusiastic: I'm not gangbusters over the idea.

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Idioms for gangbuster

    go gangbusters, to be extremely successful: The movie went gangbusters.
    like gangbusters, 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.

Origin of gangbuster

First recorded in 1935–40; gang1 + buster
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020