DICT.TW Dictionary Taiwan

 let the cat out of the bag
 泄露祕密

 let the cat out of the bag
      v : divulge confidential information or secrets;  "Be
          careful--his secretary talks" [syn: spill the beans, talk,
           tattle, blab, peach, babble, sing, babble out,
           blab out] [ant: keep quiet]