big mouth, have a
Also, have or be a loud mouth. Be loquacious, often noisily or boastfully; be tactless or reveal secrets. For example, After a few drinks, Dick turns into a loud mouth about his accomplishments, or Don't tell Peggy anything confidential; she's known for having a big mouth. [Slang; late 1800s]
Words nearby big mouth, have a
big league,
big lie,
big mama,
big media,
big money,
big mouth, have a,
big muddy,
big muddy river,
big name,
big noise,
big of one