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