As we touched on earlier, the mansplainer genuinely believes he is doing you a solid by talking at you. If assuming a strong but notably disinterested glance is not working for you, simply leave. Verbally excuse yourself, although fair warning the mansplainer may not even register that and keep on yapping. As women we are often conditioned to be polite and nice. I myself still fall into this trap! I’ll keep answering someone who I’m getting a bad vibe from because I feel somehow obligated to answer him.You are under no such obligation!