Definition of cowabunga in English:

cowabunga

Pronunciation /ˌkouəˈbəNGɡə/ /ˌkaʊəˈbəŋɡə/

exclamation

informal
  • Used to express delight or satisfaction.

    • ‘Cowabunga! It's an actor's dream’

Origin

1950s first popularized by a character on the US television programHowdy Doody (1947–60). It later became associated with surfing culture and was further popularized by use on the US television cartoon program Teenage Mutant Ninja Turtles (1987–96).