n. someone who talks too much and tells secrets. : You are such a blabbermouth!
tv. to tell secrets in public. : Don't blabbermouth this to everybody.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Example sentences
In fact, clever attackers combine trusted input risks with blabbermouth error-reporting to exploit software.