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.
1 the temperament or mental constitution peculiar to a person or group. 2  any personal peculiarity, mannerism, etc.  an individual reaction to a drug, food, etc. that is different from the reaction of most people.