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Definition of blabbermouth

blabbermouth

/ˈblæb.ɚˌmaʊθ/
blab · ber · mouth
Plural:blabbermouths
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blabbermouth Lexical Profile

blabbermouth Game Scores & Validity

• noun

1

A person who talks excessively or indiscreetly, especially one who habitually reveals secrets or private matters.

Example

"We decided not to tell him about the surprise party because he has a reputation for being a blabbermouth."

Synonyms
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Antonyms
View all antonyms for blabbermouth

• Nearby Words

bizarro
blab
blabber
blabbermouth
blabby
black
black and white tegu

Word Origin & Etymology

Coined in the early 20th century as an informal compound of the verb 'blabber' (from Middle English 'blaberen', of imitative origin) and 'mouth'.

Cite this Entry

Wordmom. (2026). Definition of Blabbermouth. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/blabbermouth
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