big mouth
1 ENTRIES FOUND:
big mouth
noun
plural
big mouths
big mouth
noun
plural
big mouths
Britannica Dictionary definition of BIG MOUTH
[count]
informal
:
a person who cannot keep a secret or who talks too much
— used in phrases that describe a person who talks too much
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She's a big mouth.
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Why did you have to open your big mouth and tell everyone our business?
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Be careful of what you say around her—she has a big mouth. [=she is likely to tell other people what you said]
— big–mouthed
adjective-
The surprise was spoiled by my big-mouthed friend.
