The phrase "lets out of bag" refers to revealing a secret or confidential information that was previously kept hidden. Some synonyms for this expression include "spills the beans", "blows the lid off", "reveals all", "uncovers the truth", "exposes", and "discloses". All of these phrases convey a sense of revealing something that was intended to be kept secret or concealed. Whether intentionally or accidentally, knowingly or unknowingly, once the cat is out of the bag, it cannot be put back in. Therefore, it is crucial to be careful with the information shared and think twice before letting it out of the bag.