Hearing a nickname in your dream, represents your feelings and memories of the person to who that nickname is referred. If the nickname is not familiar, then it may be a pun or a metaphor. To dream that someone is calling you by a nickname suggests you are trying to change how you and others see you.
Dream dictionary: Nickname dream meanings
…(Injury | Wounds) In a dream, a scratch represents financial harm. If one sees another person scratching him in a dream, it means that he will cause him partial financial loss, or pain with respect to a family member, or perhaps he will accuse him of something, then compensate him for injuring his reputation. If the scratch gets infected, bleeds, or produces pus or purulence in the dream, it means that the assailant will slander him and cause a major collapse to his business. If the scratch is over one’s forehead in the dream, it means that he may die quickly. A scratch in a dream also represents a bad reputation, an acronym, or a nickname such as stingy, insolent, or apostate, etcetera. A scratch in a dream also means recanting one’s statement. (Also see Scratching)…