A new word

Carter has learned a new word - "no". He has indicated no by saying "uh-uh" or shaking his head for a long time. But he started saying the word this week and has been saying it non-stop all weekend. At first the way he'd say it was kind of cute, but now it just sounds whiny. I am hoping this phase ends quickly because it is not fun. I'm very tired of hearing "No, Mama. No, Mama. No, Mama."