gangbuster

 
Pronunciation: /ˈgaŋbʌstə/

noun

North American informal
  • 1an officer of a law-enforcement agency who takes part in breaking up criminal gangs.
  • 2 [as modifier] very successful: the restaurant did gangbuster business

Phrases

go (or like) gangbusters

North American used to refer to great vigour, speed, or success: the real estate market was going gangbusters