Wordnet 3.0
VERB (1)
1. 
 divulge confidential information or secrets; 
- Example: "Be careful--his secretary talks"[syn: spill the beans, let the cat out of the bag, talk, tattle, blab, peach, babble, sing, babble out, blab out]
WordNet (r) 3.0 (2006):
babble out
    v 1: divulge confidential information or secrets; "Be careful--
         his secretary talks" [syn: spill the beans, let the cat
         out of the bag, talk, tattle, blab, peach,
         babble, sing, babble out, blab out] [ant: keep
         one's mouth shut, keep quiet, shut one's mouth]