To have interaction with an imp or to encounter or to see an imp, when you are dreaming, has the symbolic significance of disbalance and disharmony. Imp is a symbol of chaos and disorder. Dreaming about an imp shows that you have some troubles in your waking life. On the other hand, there can be different explanation, the imp has meaning of misunderstanding of yourself. Imp in the dream stands as an omen for the negative thoughts about your own personal qualities and repressed emotions.
Dream dictionary: Imp dream meanings
…To see imps in your dream, signifies trouble from what seems a passing pleasure. Dreaming that you are an imp, denotes that folly and vice will bring you to poverty….