The term 'Little Rogue' is a three-letter acronym for IMP, which stands for 'Intermittent Misbehaving Person'. This term is used to describe someone who is prone to misbehaving or acting out in an unpredictable manner. It is often used to refer to children or adolescents who display disruptive behavior. Little Rogue can also be used to describe adults who have difficulty controlling their impulses or emotions.