Dictionary

blabbermouth

noun blab·ber·mouth \ˈbla-bər-ˌmath\

: someone who reveals secrets or talks too much

Full Definition of BLABBERMOUTH

:  a person who talks too much; especially :  tattletale
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Examples of BLABBERMOUTH

  1. <told the blabbermouth to put a lid on it>

First Known Use of BLABBERMOUTH

1936

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