blabbermouth

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Related to blabbermouths: blab

blabbermouth

1. verb To share information that is supposed to be kept private or secret. Quit blabbermouthing everything I tell you to the whole family!
2. noun One who is prone to talking a lot and sharing such private information. I can't tell my little brother anything because he's such a blabbermouth.

blabbermouth

1. n. someone who talks too much and tells secrets. You are such a blabbermouth!
2. tv. to tell secrets in public. Don’t blabbermouth this to everybody.
References in periodicals archive ?
They have to go into the FBI WitnessProtection Programme but unfortunately, not even the FBI can save them from their own blabbermouths.
Then the little blabbermouths might repeat later what they heard.
Sorry if we're not f***ing blabbermouths - Jesus Christ