gangbusters adjective 1adverb 1 adjective1 •(informal) Very successful or profitable.What went wrong for Ophelia Lovibond? It was all looking gangbusters after a string of entry-level Hollywood roles. — 2011 adverb1 •(informal) With great energy or speed; very well.This follows Llewelyn-Bowen on a promotional parade through China, his hopes resting largely on the basis that his British quirkiness will go gangbusters with Shanghai shoppers. — 2015
