"Wait until you learn street Korean and find out what he's been saying behind your back."

Do you really want to display yourself in front of people who say such things behind your back?

And he also wonders what people are saying behind his back.

It's kind of like finding out what someone has said behind your back.

There are a lot of guys who will say something behind your back.

You felt that there were things being said behind your back.

For some reason he was terrified about what we might have said of him behind his back.

"They want to say things in public to you that they've been saying behind your back for years."

Only because you don't know what I say behind your back.

"The office could be political in the right hands," a voice said behind my back.