Antonyms for the word "no dummy" may include intelligent, clever, brilliant, smart, knowledgeable, astute, proficient, apt, quick-witted, and sharp. These are all positive terms that describe someone who is capable and skilled in their respective field. It is important to note that there is no shame in being a "dummy" or not knowing something, as everyone has their own strengths and weaknesses. However, striving to improve oneself and expanding knowledge and skills can ultimately lead to personal growth and success. Using antonyms for "no dummy" can help emphasize the importance of knowledge and intelligence in today's society.