Idiom: Open One's MouthCheck definitions of...openonesmouthMeaningsto speakExample: "I advise you: don't open your mouth at the dinner."A-Z Proximitiesopen bookopen doorsopen fireopen one's legsopen one's mind open one's mouth open Pandora's boxopen seasonopen someone's eyesopen the battingopen the doorSimilar Idiomsopen one's mouthall one's taste is in one's mouthone's heart in one's mouthput one's foot in one's mouthput one's money where one's mouth isstick one's foot in one's mouthkeep one's ears openkeep one's options openopen one's legsopen one's mindbad taste in one's mouthborn with a silver spoon in one's mouthkeep one's mouth shutleave a sour taste in one's mouthlie ill in one's mouthshut one's mouthwatch one's mouthkeep an eye openkeep a weather eye openopen-armedSimilar Phrasesmouth-to-mouth resuscitationby word of mouthdragon's mouthdry mouthgreen adder's mouthhand-to-mouthmouth bowmouth harpmouth holemouth offmouth organtrench mouthword-of-mouthopen dooropen frameopen primaryopen sesameopen shopopen syllablebreak open