catchphrase
n. B2 Upper Intermediate UK //kˈætʃfɹeɪz// catch·phrase
n. a short, memorable phrase that a famous person or a group uses often. People often repeat it because it sounds cool or makes them feel part of a team.
n. a short, memorable phrase or expression that is frequently used by a particular person or group. Often used to identify a specific individual or to reinforce a brand identity.
His catchphrase is 'Let's get this party started'.
The politician's catchphrase 'Make our country great again' became a central theme of his entire campaign.
While the actor's early career was defined by his physical comedy, his later years were marked by a single, iconic catchphrase that became synonymous with his public persona.
From catch + phrase, from the notion that the phrase will catch in the mind of the user.