The dream symbol of a wasp indicates negative emotions and attitude toward others. To be stung by a wasp shows that there are persons around you who feels full of bad emotions such as detestation, intense dislike, anger and envy. They want to make damage and destroy you. When you kill a wasp in a dream such an action indicates that you are fighting against your enemies and you stand for your beliefs.
Read more about dreaming of Wasp in other dream meanings interpretations.