What is negative nancy meaning?

The term "Negative Nancy" is a slang term used to describe someone who is excessively pessimistic and always focuses on negative aspects of a situation. This term is typically used to describe someone who has a negative attitude and is always complaining, whining, or obsessing over negative things that have happened. Negative Nancy is used to describe someone who is a pessimist, constantly expressing negativity, cynicism, and a lack of enthusiasm for new ideas or opportunities. The term is often used in a lighthearted or teasing manner, but it can also be used in a more serious tone to express frustration with someone who is constantly bringing others down with their negative vibes.