Nina in spanish means baby...It's the slang word a boyfriend might use for his girlfriend. Your words Nina should have the accent ~ above it. like this: niÃ±a. 'Nina' means girl.
Top definition Temperamental unknown A person that can explode at any given moment, one minute everything can be super-duper and their company that of something wonderful and the next they are loathsome.
borderline personality disorder. n. Abbr. BPD. A personality disorder characterized by impulsiveness and by a long-standing pattern of instability in interpersonal relationships, behavior, mood, and self-image, with symptoms often including intense anger and fear of abandonment.