Definition of the word blabbermouth

The term "blabbermouth" is a colloquialism that has its roots in the mid-19th century in the United States. It is believed to have originated from the phrase "blab and mouth," which referred to a person who talks excessively and without discretion. Over time, the phrase was shortened to "blabbermouth," and its meaning evolved to describe someone who reveals secrets or gossip without permission. The term gained popularity in the early 20th century, particularly in the context of vaudeville and music halls, where performers would often use it to describe someone who would reveal the surprise ending of a show or a comedian's punchline. Today, the term is often used to describe someone who talks too much or reveals sensitive information, and is often used in a humorous or playful manner.