catch-phrase

/K AE1 CH F R EY0 Z/
noun
  1. 1

    A group of words, often originating in popular culture that is spontaneously popularized after widespread repeated use.

  2. 2

    A signature phrase of a particular person or group.

Source: https://en.wiktionary.org/wiki/catch-phrase, https://en.wiktionary.org/wiki/catchphrase