whacker

例句：

1. 1. The gangsters were always looking for a good whacker to take down.
   这个黑帮总是在寻找一个合适的打手来除掉。
2. 2. He was a real wacker, always getting into trouble.
   他真是个真正的打手，总是惹麻烦。
3. 3. The wacker had a reputation for being tough and uncompromising.
   这位打手以强硬和不妥协而闻名。