cowabunga
/ˌkaʊəˈbʌŋgə/exclamation
- informal used to express delight or satisfaction〈非正式〉哇（表示高兴或满意）：
Cowabunga! It's an actor's dream.
哇！那可是演员的梦想。
词源
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）.