1 used to speak to a man or boy in a way that shows you are angry with him ﹙称呼男子，表示生气﹚: Watch where you're going, buster! 小子，走路要当心！

2 (usually in compounds 通常构成复合词) a person or thing that stops or gets rid of sth 破坏者；遏制者: The new Attorney General is trying to build a reputation as a crime buster. 新任司法部长正在试图塑造犯罪遏制者的形象。