A " shredder" is a machine that shreds things.

“碎纸机”是一种粉碎东西的机器。

You can be a shredder but if you can't, you know, handle the trying aspects of touring, it doesn't really matter if you're like the best at your instrument.

你可以成为一名碎纸机， 但如果你不能，你知道，处理巡演中的困难方面，那么即使你是最擅长乐器的人也没关系。