ˌTeenage ˌMutant ˌNinja ˈTurtles BrE AmE ( also ˌTeenage ˌMutant ˌHero ˈTurtles British English ) trademark
a group of ↑ turtle characters that were very popular during the early 1990s, appearing in ↑ cartoon s , films, and books. The Teenage Mutant Ninja Turtles fought against bad characters and always ate ↑ pizza . They were so popular that many companies designed clothes, toys, foods, and other products which looked like them or used their pictures. They are sometimes mentioned as a typical example of something that is extremely popular for a short time, and is then forgotten about.