It's a cliche that we hear over and over. I'll be honest - I don't know what it means and i don't really have respect for myself.

Does it mean not allowing people to talk down to you? If so, I've told people to not speak that way and I end up feeling bad. I've let lots of girls disrespect me.

What does it mean? How do I actually apply it? If you can give a few examples that would be great.

Thanks