The Buck Stops Where?

What if it turns out there is no buck to pass?

When you pass the buck, you disavow responsibility for something. "Hey, it's so and so's fault", you might say.

If you get angry with someone, aren't you passing the buck... to them?

On the other hand, if you internalize something, are you just hiding the feeling (the buck, that is) for now, only to pass it on to someone else unknowingly?

Do you lash out, or do you swallow it?

What if there is no buck to pass?