Definition of cowabunga in English:

cowabunga

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 programme Howdy Doody (1947–60). It later became associated with surfing culture and was further popularized by use on the US television cartoon programme Teenage Mutant Ninja Turtles (1987–96).

Pronunciation:

cowabunga

/ˌkaʊəˈbʌŋɡə//ˌkɑːwəˈbʌŋɡə/