A sobriquet, or soubriquet, is a nickname, sometimes assumed, but often given by another, that is descriptive. A sobriquet is distinct from a pseudonym, as it is typically a familiar name used in place of a real name, without the need of explanation, and it often becomes more familiar than the original name.
A soubriquet is a nickname or a term of endearment, often used in a psychological context to refer to the special name or nickname that a therapist or counselor may give to a patient or client as a way of building rapport and creating a more positive therapeutic relationship. For example, a therapist may call a patient "brave" or "strong" as a way of reinforcing positive traits and behaviors. Another example is a counselor may call a client "Sunshine" as a way of creating a positive and warm atmosphere.