Back fence talk refers to the casual conversations that happen between neighbors in their backyard while leaning on the fence. The discussions can range from mundane topics like the weather to gossiping about other people. However, if you are looking for antonyms for back fence talk, you can consider terms like professional discussion, formal debate, or strategic planning. These phrases connote a more structured and formal setting for conversations, such as in a boardroom or conference room. Alternatively, other antonyms for back fence talk might include quiet solitude or peaceful reflection, where a person seeks to be alone and reflect on their thoughts and emotions without distractions.