Definition of blab verb from the Oxford Advanced American Dictionary

 

blab

 verb
verb
NAmE//blæb//
 
[intransitive, transitive]blab (to somebody) (about something)blab (something) (to somebody)(informal)Verb Forms present simple I / you / we / they blab
 
he / she / it blabs
 
past simple blabbed
 
-ing form blabbing
 
 
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to tell someone information that should be kept secret Someone must have blabbed to the police.
See the Oxford Advanced Learner's Dictionary entry: blab