Pronunciation: (gang'bus"tur),[key] —n.Informal. 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. 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. 4. 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.
—adj.Often, gangbusters. 1. of or like a law-enforcement officer who uses rough, aggressive, or sensational tactics in fighting crime: The undercover agents avoided the gangbusters approach. 2. strikingly effective or successful: a gangbusters year for compact cars. 3. enthusiastic: I'm not gangbusters over the idea.
—adv. go gangbusters, to be extremely successful: The movie went gangbusters.