I told him plainly that if he ever said such a thing again. I would knock the stuffing out of him.

我明白地告诉他，如果他再说这种话，我就要打得他灵魂出窍。

One of the way to deal with him is to box his ears in the first few minutes, so as to knock the stuffing out of him.

对付他的办法之一就是在头几分钟里猛打他几个耳光，先杀杀他的锐气。

The way to deal with a young fighter is to hit him hard in the first few minutes, so as to knock the stuffing out of him.

对付年轻拳击手办法就是在最初几分钟就狠狠地打击他，挫败他的锐气。