byword

noun

1. 1

   A proverb or proverbial expression, common saying; a frequently used word or phrase.

2. 2

   A characteristic word or expression; a word or phrase associated with a person or group.

3. 3

   Someone or something that stands as an example (i.e. metonymically) for something else, by having some of that something's characteristic traits.

4. 4

   An object of notoriety or contempt, scorn or derision.

5. 5

   A nickname or epithet.