locution, saying, expression - a word or phrase that particular people use in particular situations; "pardon the expression"

catch phrase, catchphrase - a phrase that has become a catchword

mantra - a commonly repeated word or phrase; "she repeated `So pleased with how its going' at intervals like a mantra"

rallying cry, war cry, watchword, battle cry, cry - a slogan used to rally support for a cause; "a cry to arms"; "our watchword will be `democracy'"