Motor-mouths are individuals who love to talk and can't seem to stop. They are those individuals who dominate conversations, have an opinion on everything, and tend to talk at length. Some synonyms for motor-mouths include chatterbox, blabbermouth, loudmouth, jabberer, and gossiper. Other synonyms include garrulous, loquacious, verbose, and talkative. All these words describe people who talk a lot, often without pause or consideration for others around them. Whatever word is used to describe such people, one thing is universally true - they are a challenge to be around for anyone who values their peace and quiet.