3. (verb)spill the beans, let the cat out of the bag, talk, tattle, blab, peach, babble, sing, babble out, blab out divulge confidential information or secrets "Be careful--his secretary talks"
Definition of 'tattle'
Webster Dictionary
1. (noun)tattle idle talk or chat; trifling talk; prate
2. (verb)tattle to prate; to talk idly; to use many words with little meaning; to chat
3. (verb)tattle to tell tales; to communicate secrets; to be a talebearer; as, a tattling girl