bus·ter /ˈbʌstə $ -ər/ noun 1 TALK TO somebody American EnglishAmE spoken used to speak to a man who is annoying you or who you do not respect 小子〔对男子的蔑称〕 You’re under arrest, buster! 小子,你被捕了!
2. crime-buster/budget-buster/sanctions-buster etc informal used with nouns to mean someone or something that ends a situation or stops an activity 打击犯罪/耗尽预算/打破制裁的人[事物]等