The term 'had a big mouth' can be described by four crossword solutions: TATTLED (7 letters), GAPED (5 letters), toldall (7 letters), and spilledthebeans (15 letters). TATTLED means to have revealed secrets or private information, usually in a malicious way. GAPED means to have opened one's mouth wide in surprise or awe. Toldall means to have revealed all the details of something, often without being asked. Finally, spilledthebeans means to have revealed a secret or private information, usually unintentionally.