To sign or to register someone for something means to put someone down.

为某事签名或注册某人意味着贬低某人。

When you " put someone down, " you are saying they are not as good as you.

当你“贬低某人”时，你是在说他们不如你。

If you're gonna go that low to put someone down, then you better make damn sure that they don't get back up.

你要是用那样的手段打到一个人，最好别让他们能再爬起来。

You may think that all gossip is intended to put someone down, but there are actually other reasons you may end up talking about someone behind their back.

你可能认为所有的闲话都是为了贬低某人，但实际上还有其他原因，让你可能会在背后谈论某人。