Big-mouth Definition

noun

(idiomatic) The mouth of someone who talks too much, especially by making exaggerated claims or by inappropriately revealing information.

Shut your big mouth or I'll shut it for you.
Wiktionary

(idiomatic) A person who who talks too much, especially by making exaggerated claims or by inappropriately revealing information.

Shut up, big mouth!
Wiktionary

Other Word Forms of Big-mouth

Noun

Singular:
big-mouth
Plural:
big-mouths

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big-mouth