What does it mean when you have bumps on your ears?

Due to the lack of specificity of your question, it could be a number of things. If you have had it for your entire life, it's likely a cartilage or the genetic trait called Darwin's Ear Point. If it's something new, it could be an enlarged lymph node or a subcutaneous cyst. Both are minor but it should be looked at by a physician, because there are major problems that it could be such as a tumor or a blood clot.