Have you ever been with someone whose mere presence takes a toll on your psyche? If yes, then you know exactly what negative energy means. But if no, keep reading, and you will know what it is and how to protect yourself from negative energy. Spirituality suggests that every human being has an aura and gives off different vibes. When someone has a character that generates negative thoughts, and you feel like you are losing hope, that aura is said to be negative energy. It can have adverse effects on one's mental as well as physical health.