There are several synonyms for the phrase "slip tongue", which refers to when someone accidentally says something they did not intend to. One such synonym is "verbal slip", which has a similar meaning and is often used in formal settings such as professional meetings or presentations. Another synonym is "Freudian slip", which specifically refers to when someone unintentionally reveals their true thoughts or feelings through their speech. A more informal synonym for "slip tongue" is "foot-in-mouth", which is typically used in social situations and is often accompanied by a sense of embarrassment or shame. Regardless of which term is used, all synonyms for "slip tongue" describe a common human mistake made during communication.