bigmouths
/ˈbɪɡˌmaʊðz/
noun
- People who talk too much or say things that are secret, private, or likely to cause trouble.
- The team lost because a few bigmouths couldn't keep the strategy quiet.
- Be careful what you say around bigmouths; they'll tell everyone.
- At family gatherings, the bigmouths always reveal embarrassing stories.