The sentences are from wikiHow: 5 Ways to Change Your Whole Personality. What does 'sock' mean here? Does it mean the cloth that covers the foot? Many thanks! Stomp out negative thoughts. Just stop. The beauty of your brain is that it is part of you and you therefore control it. If you find yourself thinking, "Ohmigod, I can't, I can't, I can't, I can't, I can't," you probably won't be able to. When the voice starts going, put a sock in it. It's not doing you any good.