Dream about being kissed by someone on the lips is a signal for someone that appears cold and frigid on the outside, but is really a warm and caring person on the inside. You may be trying to shield yourself or be less noticeable. You are lacking determination and energy needed to move forward in some situation. The dream signals some aspect of yourself that you have forgotten or neglected. You are trying to be someone you are not.
Being kissed by someone on the lips dream is a clue for destruction and frustrations in your life. There is some situation or problem that you need to master and get a handle on. You have said something that has offended someone. The dream is a warning for anger and uncontrolled aggression. You need to resolve past issues and old problems in order to make a clean start for yourself.
If you dreamt about being kissed by someone on the lips:
You may find that you are feeling an uncharacteristic lack of confidence when it comes to your personal relationships today. You will be more aware of your shortcomings if you allow yourself to experience them directly. In fact, this can be the first step to a greater sense of awareness between you and your partner (current or prospective). Don't fear what you see today; rather, learn from it.