A catch phrase is a popular saying or expression that quickly becomes a recognizable slogan or trademark. It can be used to promote products, political campaigns, or even to express an opinion or belief. Some synonyms for catch phrase include tagline, slogan, motto, catchword, buzzword, and byword. Tagline refers to a catchy phrase that summarizes a brand's mission or identity. A slogan is a distinctive phrase with a commercial or political purpose. A motto is a phrase that encapsulates the values of an individual or organization. Catchword and buzzword both describe trendy or popular words or phrases that gain widespread use. Byword refers to a phrase that becomes a universal expression.