The phrase "new wrinkle" is an idiomatic expression that means a new or unusual idea, method, or approach to something. It can also refer to a small change in appearance or behavior, such as developing a new facial expression line or altering one's manner of speaking. The term comes from the physical characteristic of wrinkles on skin, which are folds or creases that form over time due to muscle contractions and other factors. When someone introduces something "new" into an existing situation, it can be described as a new wrinkle - a fresh addition that adds variety or interest.