To see the jaws of an animal in your dream indicate a misunderstanding. It may also mean that you are rushing into things. Alternatively, the dream suggests that someone or some situation is taking a large bite of your time, energy or some aspect of yourself.
To see your own jaw in your dream represents your stubbornness, determination and forcefulness. You may need to have more willpower and fortitude in some situation. To dream that your jaws are tight indicates unexpressed angers and other powerful feelings which you are holding back.
To dream that you break or dislocate your jaw suggests that you are compromising your own beliefs and principles.