The phrase "talk one's leg off" means to talk excessively or without pause. Its antonyms would be words or phrases that mean the opposite, such as being quiet, silent, or reserved. Other antonyms could include listening, pausing, or taking breaks in conversation. Often, the opposite of "talking one's leg off" is being mindful of one's speech and attentively listening to what others have to say. In short, while talking a lot is sometimes necessary, it's equally important to know when to stop and listen to others.
